private function givenMessageWillBeFoundByContextValue()
 {
     $this->messageFinder->shouldReceive('findByReference')->with($this->contextValue)->andReturn($this->sourceMessage);
 }
 private function givenMessageMatchingContextExists()
 {
     $this->messageFinder->shouldReceive('findByReference')->with($this->contextValue)->andReturn($this->sourceMessage);
 }