@MemberSupport
Indicates that a method is a supporting-method, one that contributes (hide, validate, …) to an Action , Property or Collection .
For mixins is also allowed to be placed on the mixin’s main method.
By placing the MemberSupport annotation on a method, a contract with the meta-model is enforced, such that this method must be recognized by the meta-model and cannot be ignored.
It is complementary to ObjectSupport and ObjectLifecycle , and in some sense acts as the semantic counterpart to Programmatic .