question: is the character a letter concode_field_sep Scanner scanner concode_elem_sep String procedureDir concode_elem_sep Properties properties concode_field_sep Token getNumber concode_elem_sep void skipComment concode_elem_sep String getProcedureDir concode_elem_sep Token getIdentifier concode_elem_sep Token getToken concode_elem_sep boolean isDigit concode_elem_sep void skipSpaces concode_elem_sep Token getString concode_elem_sep boolean isProcedure concode_elem_sep boolean isSpace
target: boolean function ( char arg0 ) { return ( ( arg0 >= 'a' ) && ( arg0 <= 'z' ) ) || ( ( arg0 >= 'A' ) && ( arg0 <= 'Z' ) ) || ( arg0 == '_' ) ; }