TokenSet function ( ) { return null ; }
returns tokenset , containing bare regex prefixesj like = ~ or case concode_field_sep ExtensionPointName<PerlParserExtension> EP_NAME concode_field_sep boolean parseTerm concode_elem_sep boolean parseStatement concode_elem_sep List<Pair<IElementType,TokenSet>> getExtensionSets concode_elem_sep Map<String,IElementType> getCustomTokensMap concode_elem_sep boolean parseStatementModifier concode_elem_sep boolean parseNestedElement