private static boolean isLetterDigitOrUnderscore(char c) {
		return Character.isLetterOrDigit(c) || c == '_';
	}
@param c is a character
@return true if the given character is a letter, digit, or underscore
Ghidra/Features/Decompiler/src/main/java/ghidra/app/decompiler/ClangTokenGroup.java