question: public static String unquote ( String string ) { if ( string . startsWith ( "'" ) && string . endsWith ( "'" ) ) { string = string . substring ( 1 , string . length ( ) - 1 ) ; if ( ( string . indexOf ( "\\n" ) != - 1 ) || ( string . indexOf ( "\\r" ) != - 1 ) || ( string . indexOf ( "\\'" ) != - 1 ) || ( string . indexOf ( "\\\"" ) != - 1 ) || ( string . indexOf ( "\\\\" ) != - 1 ) || ( string . indexOf ( "\\t" ) != - 1 ) || ( string . indexOf ( "\\%" ) != - 1 ) || ( string . indexOf ( "\\u001E" ) != - 1 ) ) { string = unbackQuoteChars ( string ) ; } } return string ; }
target:  unquotes are previously quoted string (but only if necessary), i.e., it removes the single quotes around it. Inverse to quote(String).