When you use Object.entries(formData), it attempts to convert the FormData object into an array of key-value pairs, as it would with a regular JavaScript object. However, since FormData doesn't store its data in enumerable properties, Object.entries returns an empty array.This will not work: Object.entries(options.formData)         .filter(([_, value]) => isDefined(value))        .forEach(([key, value]) => {            if (Array.isArray(value)) {                value.forEach(v => process(key, v));            } else {                process(key, value);            }        });On the other hand, formData.entries() is a method specifically provided by the FormData interface. It returns an iterator allowing for the traversal of all key/value pairs contained in the FormData object. This method is designed to understand and interact with the internal structure of FormData, so it successfully retrieves the data.This will work:for (let [key, value] of options.formData.entries()) {      if (isDefined(value)) {        if (Array.isArray(value)) {          value.forEach((v) => process(key, v));        } else {          process(key, value);        }      }    }