if ( $ns[0] == NS_MAIN ) {
$ns = $this->namespaces; // no explicit prefix, use default namespaces
Hooks::run( 'PrefixSearchExtractNamespace', [ &$ns, &$search ] );
if ( $ns[0] == NS_MAIN ) {
$ns = $this->namespaces; // no explicit prefix, use default namespaces
Hooks::run( 'PrefixSearchExtractNamespace', [ &$ns, &$search ] );