protected function process( array $stmts )
	{
		$this->msg( 'Adding "vatid" column to fe_users tables', 0 ); $this->status( '' );

		foreach( $stmts as $table => $stmt )
		{
			$this->msg( sprintf( 'Checking "%1$s" table', $table ), 1 );

			if( $this->schema->tableExists( $table ) === true
				&& $this->schema->columnExists( $table, 'vatid' ) === false )
			{
				$this->execute( $stmt );
				$this->status( 'added' );
			} else {
				$this->status( 'OK' );
			}
		}
	}