@Override
		public int hashCode() {
			return Objects.hash(type, codePoint, propertyIntervalSet, parseLength);
		}
Utility class to parse escapes like:
  \\n
  \\uABCD
  \\u{10ABCD}
  \\p{Foo}
  \\P{Bar}
  \\p{Baz=Blech}
  \\P{Baz=Blech}
tool/src/org/antlr/v4/misc/EscapeSequenceParsing.java