@Deprecated
    @Override
    @SuppressWarnings("deprecation")
    public Value getJson(int columnIndex) {
        return this.getJsonValue(columnIndex).toMsgpack();
    }
Returns a JSON value at the specified column in the {@code msgpack-java} representation.

@param columnIndex  the index the column to get the JSON value
@return the JSON value
@deprecated Use {@link #getJsonValue(int)} instead.
embulk-core/src/main/java/org/embulk/spi/PageReaderImpl.java