foreach ( $this->namespaceNames as $key => $text ) {
if ( !isset( $validNamespaces[$key] ) ) {
unset( $this->namespaceNames[$key] );
foreach ( $this->namespaceNames as $key => $text ) {
if ( !isset( $validNamespaces[$key] ) ) {
unset( $this->namespaceNames[$key] );