public function addQuery(string $key, $value = null)
	{
		$this->query[$key] = $value;

		return $this;
	}
public function addQuery(string $key, $value = null)
	{
		$this->query[$key] = $value;

		return $this;
	}
public function addQuery ( string $ key , $ value = null ) { $ this -> query [ $ key ] = $ value ; return $ this ; }
Adds a single new element to the query vars.

@param string $key
@param mixed  $value

@return $this
Adds a single new element to the query vars .