question: extract urls from plain text . concode_field_sep Pattern LINKS_PATTERN concode_elem_sep String LINKS_REGEX concode_field_sep placeholderType placeHolder
target: List < String > function ( String arg0 ) { if ( arg0 == null || arg0 . length ( ) == 0 ) { return Collections . emptyList ( ) ; } List < String > loc0 = new ArrayList < String > ( ) ; final Matcher loc1 = LINKS_PATTERN . loc1 ( arg0 ) ; while ( loc1 . find ( ) ) { loc0 . add ( loc1 . group ( ) ) ; } return loc0 ; }