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For all AspectCocoa related purposes, an ACInvocation is the same thing as an NSInvocation except that it is not actually an NSInvocation (not a subclass of NSInvocation). Otherwise it has nearly the same interface.
/* Returns the NSMethodSignature object describing the method to be invoked. */ - (NSMethodSignature *)methodSignature; /* set/get the selector to be invoked on the target */ - (void)setSelector:(SEL)sel; - (SEL)selector; /* set/get the target of the invocation */ - (id)target; - (void)setTarget:(id)obj; /* returns the class containg the method for which this invocation was created note that this may or may not the same class as [[invocation target] class]; (which will always return the lowest level class of the object.) */ - (Class)getClass; /* set/get the target of the invocation */ - (void)invoke; - (void)invokeWithTarget:(id)target; /* set/get the return value or argument values of the invocation same usage as on NSInvocation */ - (void)getReturnValue:(void *)retLoc; - (void)setReturnValue:(void *)retLoc; - (void)getArgument:(void *)argumentLocation atIndex:(int)index; - (void)setArgument:(void *)argumentLocation atIndex:(int)index;