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()
buildView(FormView $view,
FormBuilderInterface add(string|int|
bool isValid() Returns whether the form and all children are valid. If the form is not
FormInterface getForm()
string getAction() Unsupported method.
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