isIdentifier static method
Implementation
static bool isIdentifier(String c) {
int code = c.codeUnitAt(0);
return c == '_' ||
(code >= 'a'.codeUnitAt(0) && code <= 'z'.codeUnitAt(0)) ||
(code >= 'A'.codeUnitAt(0) && code <= 'Z'.codeUnitAt(0)) ||
(code >= '0'.codeUnitAt(0) && code <= '9'.codeUnitAt(0)) ||
code > 0x009F;
}