}

    @Override
    public String toString() {
      return "(" + getRowKey() + "," + getColumnKey() + ")=" + getValue();
    }
  }

  /**
   * Creates a transposed view of a given table that flips its row and column keys. In other words,
   * calling {@code get(columnKey, rowKey)} on the generated table always returns the same value as
   * calling {@code get(rowKey, columnKey)} on the original table. Updating the original table

her eye fell upon a little bottle that stood near the looking-
glass.  There was no label this time with the words `DRINK ME,'
but nevertheless she uncorked it and put it to her lips.  `I know
SOMETHING interesting is sure to happen,' she said to herself,
`whenever I eat or drink anything; so I'll just see what this
bottle does.  I do hope it'll make me grow large again, for

her eye fell upon a little bottle that stood near the looking-
glass.  There was no label this time with the words `DRINK ME,'
but nevertheless she uncorked it and put it to her lips.  `I know
SOMETHING interesting is sure to happen,' she said to herself,
`whenever I eat or drink anything; so I'll just see what this
bottle does.  I do hope it'll make me grow large again, for

    }
  }

  /** Returns the number of elements between the limit and capacity. */
  private static int availableCapacity(Buffer buffer) {
    return buffer.capacity() - buffer.limit();
  }

  /**
   * Flips the buffer output buffer so we can start reading bytes from it. If we are starting to
   * drain because there was overflow, and there aren't actually any characters to drain, then the
   * overflow must be due to a small output buffer.