code: public function addMethods($mixin, array $methods)
  	{
  		foreach ($methods as $method)
  		{
  			$this->method_map[$method] = $mixin;
  		}
  
  		return $this;
  	}
docs: Adds "mixin" methods to this class.
  
  @param  string $mixin  The name of the mixin
  @param  array $methods  A list of methods to add
  @return \Petoyte\Query