Optional
aInstancePtr: objectA run time mechanism for interface discovery.
NS_OK if the interface is supported by the associated instance, NS_NOINTERFACE if it is not.
aInstancePtr must not be null.
[in] A requested interface IID
[out] A pointer to an interface pointer to receive the result.
Generated using TypeDoc
This interface is used to accompany the nsIController for a element. It is used to update the commands in the
parent process when the set of child command have changed.