sequence_item.sv

class our_packet extends uvm_sequence_item;
    `uvm_component_utils(our_packet)

    //request
    rand bit[7:0] input_1;      //rand is to randomize the input bits
    bit[7:0] input_2;

    //response
    bit[15:0] output_3;

function new(string name="our_packet");
    super.new(name);