… parent method but misses adding new arguments (kevinjhappy)This PR was merged into the 4.2-dev branch.Discussion----------Trigger deprecation notices when inherited class calls parent method but misses adding new arguments| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | no| BC breaks?    | no| Deprecations? | yes| Tests pass?   | yes| Fixed tickets || License       | MIT| Doc PR        |This Pull Request concern severals components, the purpose here is to notify in dev mode that in a case of inherit class, a function will have a new or severals arguments in Symfony 5.0, therefore not implement it is deprecated since Symfony 4.2The function is made by these conditions :1- ```(func_num_args() < $x)``` where [x] is the number of arguments we will have in Symfony 5.0  this check allow to verify that the arguments are missing2- ```(__CLASS__ !== \get_class($this))```  this check allow to verify that the name of the class is different than the base class, therefore that we are in the child class3- ```(__CLASS__ !== (new \ReflectionMethod($this, __FUNCTION__))->getDeclaringClass()->getName())```  this check allow to verify that the class of the current function is different than the base class, therefore the function has been rewrote into the child classCode exemple :```public function method(/* void $myNewArgument = null */){if ((func_num_args() < 1) && (__CLASS__ !== \get_class($this)) && (__CLASS__ !== (new \ReflectionMethod($this, __FUNCTION__))->getDeclaringClass()->getName())){            @trigger_error(sprintf('The "%s()" method will have one `void $myNewArgument = null` argument in version 5.0 and higher.Not defining it is deprecated since Symfony 4.2.', __METHOD__ ), E_USER_DEPRECATED);    }    // do something}```The unit test are made by creating a child Class using for the tested function ```return parent::function()``` and by calling this child class and catching the expected depreciation messageCommits-------f75fffa Trigger deprecation notices when inherited class calls parent method but misses adding new arguments

…efined in sub classes (GuilhemN)This PR was merged into the 4.2-dev branch.Discussion----------[Debug] Trigger a deprecation for new parameters not defined in sub classes| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets |symfony/symfony#28316| License       | MIT| Doc PR        | -I'm not sure the waysymfony/symfony#28316 is implemented is the best so here is an alternative.Instead of counting on a call from the child method, it uses the `DebugClassLoader` and `@param` annotations. If a `@param` annotation is used on a parent but is then not actually implemented in the child class, a deprecation will be thrown.Example:```phpclass ClassWithAnnotatedParameters{    /**     *@param string $foo This is a foo parameter.     */    public function fooMethod(string $foo)    {    }    /**     *@param string $bar parameter not implemented yet     */    public function barMethod(/** string $bar = null */)    {    }    /**     *@param Quz $quz parameter not implemented yet     */    public function quzMethod(/** Quz $quz = null */)    {    }}``````phpclass SubClassWithAnnotatedParameters extends ClassWithAnnotatedParameters {    public function fooMethod(string $foo) { }    public function barMethod($bar = null) { }    public function quzMethod() { }}```A deprecation will be triggered because ``SubClassWithAnnotatedParameters::quzMethod()`` which doesn't definee `$quz`.Commits-------1f5d8b62f7 [Debug] Trigger a deprecation for new parameters not defined in sub classes

…efined in sub classes (GuilhemN)This PR was merged into the 4.2-dev branch.Discussion----------[Debug] Trigger a deprecation for new parameters not defined in sub classes| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets |symfony/symfony#28316| License       | MIT| Doc PR        | -I'm not sure the waysymfony/symfony#28316 is implemented is the best so here is an alternative.Instead of counting on a call from the child method, it uses the `DebugClassLoader` and `@param` annotations. If a `@param` annotation is used on a parent but is then not actually implemented in the child class, a deprecation will be thrown.Example:```phpclass ClassWithAnnotatedParameters{    /**     *@param string $foo This is a foo parameter.     */    public function fooMethod(string $foo)    {    }    /**     *@param string $bar parameter not implemented yet     */    public function barMethod(/** string $bar = null */)    {    }    /**     *@param Quz $quz parameter not implemented yet     */    public function quzMethod(/** Quz $quz = null */)    {    }}``````phpclass SubClassWithAnnotatedParameters extends ClassWithAnnotatedParameters {    public function fooMethod(string $foo) { }    public function barMethod($bar = null) { }    public function quzMethod() { }}```A deprecation will be triggered because ``SubClassWithAnnotatedParameters::quzMethod()`` which doesn't definee `$quz`.Commits-------1f5d8b62f7 [Debug] Trigger a deprecation for new parameters not defined in sub classes

…efined in sub classes (GuilhemN)This PR was merged into the 4.2-dev branch.Discussion----------[Debug] Trigger a deprecation for new parameters not defined in sub classes| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets |#28316| License       | MIT| Doc PR        | -I'm not sure the way#28316 is implemented is the best so here is an alternative.Instead of counting on a call from the child method, it uses the `DebugClassLoader` and `@param` annotations. If a `@param` annotation is used on a parent but is then not actually implemented in the child class, a deprecation will be thrown.Example:```phpclass ClassWithAnnotatedParameters{    /**     *@param string $foo This is a foo parameter.     */    public function fooMethod(string $foo)    {    }    /**     *@param string $bar parameter not implemented yet     */    public function barMethod(/** string $bar = null */)    {    }    /**     *@param Quz $quz parameter not implemented yet     */    public function quzMethod(/** Quz $quz = null */)    {    }}``````phpclass SubClassWithAnnotatedParameters extends ClassWithAnnotatedParameters {    public function fooMethod(string $foo) { }    public function barMethod($bar = null) { }    public function quzMethod() { }}```A deprecation will be triggered because ``SubClassWithAnnotatedParameters::quzMethod()`` which doesn't definee `$quz`.Commits-------1f5d8b6 [Debug] Trigger a deprecation for new parameters not defined in sub classes

…anagi)This PR was merged into the 5.0-dev branch.Discussion----------[Serializer] Remove last deprecated/obsolete paths| Q             | A| ------------- | ---| Branch?       | master <!-- see below -->| Bug fix?      | no| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->| BC breaks?    | no     <!-- seehttps://symfony.com/bc -->| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->| Fixed tickets |#28316,#28709,#31030,#27020,#29896,16f8a13#r201060750   <!-- #-prefixed issue number(s), if any -->| License       | MIT| Doc PR        | N/A <!-- required for new features -->This should fix the last deprecations & obsolete code paths for the Serializer component.Commits-------c703b35 [Serializer] Remove last deprecated/obsolete paths