@SuppressWarnings("unused")
	private boolean isHexDigit(char charAt) {
		if (Character.isDigit(charAt)) {
			return true;
		}
		if ("abcdef".indexOf(charAt) >= 0) {
			return true;
		}
		if ("ABCDEF".indexOf(charAt) >= 0) {
			return true;
		}
		return false;
	}
Finds the parameter passed into the resource function call
@param constUse - Key value pairs of the resource function calls
@param defUseList
@param highFunction
@param vnode
@param doneSet
Ghidra/Features/Decompiler/ghidra_scripts/WindowsResourceReference.java