@Override
  public void setIsPostMerge(final Difficulty totalDifficulty) {
    postMergeContext.setIsPostMerge(totalDifficulty);
  }
Instantiates a new Transition context.

@param preMergeContext the pre merge context
@param postMergeContext the post merge context
consensus/merge/src/main/java/org/hyperledger/besu/consensus/merge/TransitionContext.java