IN: Identifier of the data transfer property list used to create the buffer
IN: Pointer to the buffer to be reclaimed
H5T_RECLAIM reclaims memory buffers created to store VL datatypes. It only frees the variable length data in the selection defined in the dataspace specified by space_id. The dataset transfer property list dxpl_id is required to find the correct allocation and/or free methods for the variable length data in the buffer.