Why was it necessary to create a separate class of uvm_seq_item_pull_port for use in the driver-sequencer handshake?

UVM
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Hi,
My question is - why was it necessary to create a separate class of uvm_seq_item_pull_port for use in the driver-sequencer handshake? Could this functionality have been achieved by using ‘regular’ classes of ports, exports and imps? If not, what is the motivation for introducing this separate class? Thanks

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In reply to dhrub1:
https://verificationacademy.com/forums/uvm/why-trynextitem-sequencer/port/etc-declared-task#reply-71774