This abstract class can be implemented by matchers which needs to check the number of times an invocation has occured.
void getInvocationCount( )
void getInvocations( )
void hasBeenInvoked( )
void invoked( PHPUnit2_Extensions_MockObject_Invocation $invocation)
Overridden in child classes as:
void matches( PHPUnit2_Extensions_MockObject_Invocation $invocation)