public static boolean isControlCharacterOrBackslash(char c) {
		return controlToEscapeStringMap.containsKey(c);
	}
Returns true if the given character is a special character. For example a '\n' or '\\'. A
value of 0 is not considered special for this purpose as it is handled separately because it
has more varied use cases.

@param c the character
@return true if the given character is a special character
Ghidra/Framework/Generic/src/main/java/ghidra/util/StringUtilities.java