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why there is no real sequencer, only virtual sequencer for this sequence. OVM

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sages

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Hi All,

I have a question for below code for OVM

Code:
class base_vseqr extends ovm_virtual_sequencer;
   X_seqr X_seqr_h;
   Y_seqr Y_seqr_h;

  `ovm_sequencer_utils(base_vseqr)
   .....
endclass

class A_seq extends ovm_sequence;
  B_seq B_seq_h;
  `ovm_create_on(B_seq_h, p_sequencer);
  B_seq_h.start(p_sequencer);
endclass

I think there is no real sequencer to be indicated for B_seq_h, how could B_seq_h execute ? Is that possible?
 

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