original_string: private function invokeCallback($method_name, $must_exist=true)
  	{
  		return static::table()->callback->invoke($this,$method_name,$must_exist);
  	}
code: private function invokeCallback($method_name, $must_exist=true)
  	{
  		return static::table()->callback->invoke($this,$method_name,$must_exist);
  	}
code_tokens: private function invokeCallback ( $ method_name , $ must_exist = true ) { return static :: table ( ) -> callback -> invoke ( $ this , $ method_name , $ must_exist ) ; }
docstring: Invokes the specified callback on this model.
  
  @param string $method_name Name of the call back to run.
  @param boolean $must_exist Set to true to raise an exception if the callback does not exist.
  @return boolean True if invoked or null if not
docstring_tokens: Invokes the specified callback on this model .