bool has(string $name) Unsupported method.
FormConfigBuilderInterface
FormFactoryInterface getFormFactory()
bool getDataLocked() Returns whether the form's data is locked. A form with locked data
mixed getData() Returns the initial data of the form.
int count() Returns the number of elements in the iterator. Note that this is not the
FormTypeInterface getType(string $name)
FormError|
FormInterface|null getParent()
FormConfigInterface getFormConfig()
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