@Command(name ="hello")publicclassHelloCommand {@Executevoidcommand(@SenderCommandSendersender,@ArgStringname) {// ...    }}

@Retention(RetentionPolicy.RUNTIME)@Target(ElementType.PARAMETER)@RequirementDefinition(type =RequirementDefinition.Type.CONTEXT)public @interfaceMySender {}

@Executevoidcommand(@MySenderCommandSendersender,@ArgStringname) {// ...    }

publicclassUserArgumentResolverextendsArgumentResolver<CommandSender,User> {privatefinalPatternVALID_USER_PATTERN =Pattern.compile("^[a-zA-Z0-9_]{3,16}$");privatefinalUserServiceuserService;publicUserArgumentResolver(UserServiceuserService) {this.userService =userService;    }@OverrideprotectedParseResult<User>parse(Invocation<CommandSender>invocation,Argument<User>context,Stringargument) {CompletableFuture<ParseResult<User>>userNotFound =userService.getUser(argument)            .thenApply(user ->user !=null ?ParseResult.success(user) :ParseResult.failure("User not found"));returnParseResult.completableFuture(userNotFound);    }@Overridepublicbooleanmatch(Invocation<CommandSender>invocation,Argument<User>context,Stringargument) {returnVALID_USER_PATTERN.matcher(argument).matches();    }}

@OverrideprotectedParseResult<User>parse(Invocation<CommandSender>invocation,Argument<User>context,Stringargument) {returnParseResult.async(() ->userDatabase.getUser(argument));    }

ContextResult.completableFuture()

ContextResult.async()

implementation("dev.rollczi:{artifact}:3.7.0")

<dependency>    <groupId>dev.rollczi</groupId>    <artifactId>{artifact}</artifactId>    <version>3.7.0</version></dependency>