public function get_variables( $key )
	{
		if ( ! empty( $this->variables[ $key ] ) ) {
			return $this->variables[ $key ];
		} else {
			return null;
		}
	}
public function get_variables( $key )
	{
		if ( ! empty( $this->variables[ $key ] ) ) {
			return $this->variables[ $key ];
		} else {
			return null;
		}
	}
public function get_variables ( $ key ) { if ( ! empty ( $ this -> variables [ $ key ] ) ) { return $ this -> variables [ $ key ] ; } else { return null ; } }
Get variables for the senario.

@param string $key The parameter for this extension.
@return array The value of the variable.
Get variables for the senario .