code: func (m *Mock) findExpectedCall(method string, arguments ...interface{}) (int, *Call) {
  	for i, call := range m.ExpectedCalls {
  		if call.Method == method && call.Repeatability > -1 {
  
  			_, diffCount := call.Arguments.Diff(arguments)
  			if diffCount == 0 {
  				return i, call
  			}
  
  		}
  	}
  	return -1, nil
  }
docs: // /*
  // 	Recording and responding to activity
  // */