'Comparison
:param FunctionReturn o: The other object
:return: True if equal, False otherwise'

def __eq__(self, o):

    return ((self.callee_func_addr == o.callee_func_addr) and (self.caller_func_addr == o.caller_func_addr) and (self.call_site_addr == o.call_site_addr) and (self.return_to == o.return_to))
