static KeyRange keyRangeSingleRow(byte[] rowKey) {
        KeyRange keyRange = new KeyRange();
        keyRange.setStart_key(rowKey);
        keyRange.setEnd_key(rowKey);
        keyRange.setCount(1);
        return keyRange;
    }
static KeyRange keyRangeSingleRow ( byte [ ] rowKey ) { KeyRange keyRange = new KeyRange ( ) ; keyRange . setStart_key ( rowKey ) ; keyRange . setEnd_key ( rowKey ) ; keyRange . setCount ( 1 ) ; return keyRange ; }
Create a KeyRange that selects a single row with the given key.

@param rowKey    Row key as a byte[].
@return          KeyRange that starts and ends with the given key.