Block function ( ) { return block ; }
get the block concode_field_sep String datanodeIDs[] concode_elem_sep BlockWithLocations[] blocks concode_elem_sep Block block concode_field_sep void readFields concode_elem_sep void readFields concode_elem_sep String[] getDatanodes concode_elem_sep BlockWithLocations[] getBlocks concode_elem_sep void write concode_elem_sep void write