original_string: public function attributeIsDirty($attribute)
  	{
  		return $this->_dirty && isset($this->_dirty[$attribute]) && array_key_exists($attribute, $this->_attributes);
  	}
code: public function attributeIsDirty($attribute)
  	{
  		return $this->_dirty && isset($this->_dirty[$attribute]) && array_key_exists($attribute, $this->_attributes);
  	}
code_tokens: public function attributeIsDirty ( $ attribute ) { return $ this -> _dirty && isset ( $ this -> _dirty [ $ attribute ] ) && array_key_exists ( $ attribute , $ this -> _attributes ) ; }
docstring: Check if a particular attribute has been modified since loading the model.
  @param string $attribute	Name of the attribute
  @return boolean TRUE if it has been modified.
docstring_tokens: Check if a particular attribute has been modified since loading the model .