gistfile1.txt

        @Specialization
        public Object stringByteSubstring(RubyString string, long index, int length) {
            return stringByteSubstring(string, (int) index, length);
        }

        @Specialization
        public Object stringByteSubstring(RubyString string, int index, long length) {
            return stringByteSubstring(string, index, (int) length);
        }

        @Specialization
        public Object stringByteSubstring(RubyString string, long index, long length) {
            return stringByteSubstring(string, (int) index, (int) length);
        }