Convert uvm_packer attributes from UVM 1.1d, 1.2 to UVM 1800

UVM
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Can someone tell me what is the corresponding attribute of “m_packed_size” in UVM 1800.

I need to convert this line
packer.m_packed_size = packer.count;
to UVM 1800.

For count, I know I can call packer.get_packed_size;, but not able to find for m_packed_size?