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`uvm_component_utils(my_comp)
`uvm_object_utils(my_item)
`uvm_declare_p_sequencer(my_sqr)
`uvm_field_int(addr, UVM_ALL_ON)

uvm_config_db#(apb_vif)::set(this, "env.agent*", "vif", vif);
uvm_config_db#(apb_vif)::get(this, "", "vif", vif);
uvm_config_db#()::dump();

uvm_analysis_port #(txn) ap;
uvm_analysis_imp_act #(txn, sb) act_imp;
mon.ap.connect(sb.act_imp);

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virtual task body();
  repeat (N) begin
    pkt req = pkt::type_id::create("req");
    start_item(req);
    assert(req.randomize());
    finish_item(req);
  end
endtask

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function void write_act(txn t);
  act_q.push_back(t);
  if (exp_q.size()) compare(exp_q[0], act_q[0]);
endfunction

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virtual function void reg2bus(uvm_reg_item rw, ref bus_txn bus);
  bus.addr = rw.addr;
  bus.data = rw.data[0];
  bus.write = (rw.kind != UVM_READ);
endfunction

pkt::type_id::set_type_override(derived_pkt::get_type());
// BEFORE create of pkt