b.lastRuneSize = -1
	return nil
}

// Buffered returns the number of bytes that can be read from the current buffer.
func (b *Reader) Buffered() int { return b.w - b.r }

// ReadSlice reads until the first occurrence of delim in the input,
// returning a slice pointing at the bytes in the buffer.
// The bytes stop being valid at the next read.
// If ReadSlice encounters an error before finding a delimiter,

func LastIndexByte(s []byte, c byte) int {
	return bytealg.LastIndexByte(s, c)
}

// IndexRune interprets s as a sequence of UTF-8-encoded code points.
// It returns the byte index of the first occurrence in s of the given rune.
// It returns -1 if rune is not present in s.
// If r is [utf8.RuneError], it returns the first instance of any
// invalid UTF-8 byte sequence.
func IndexRune(s []byte, r rune) int {

        }
    }

    /**
     * Escapes wildcard characters in the given query string.
     *
     * This method replaces all occurrences of '*' with '\*' and
     * all occurrences of '?' with '\?' to ensure that these characters
     * are treated as literals rather than wildcard characters in queries.
     *
     * @param query the query string to escape

*   Estimator
    *   Replace all occurrences of `tf.contrib.estimator.BaselineEstimator` with
        `tf.estimator.BaselineEstimator`
    *   Replace all occurrences of
        `tf.contrib.estimator.DNNLinearCombinedEstimator` with
        `tf.estimator.DNNLinearCombinedEstimator`
    *   Replace all occurrences of `tf.contrib.estimator.DNNEstimator` with
        `tf.estimator.DNNEstimator`