public boolean isProposerAfter(final BlockHeader header) {
    final Address nextProposer = CliqueHelpers.getProposerForBlockAfter(header);
    return localAddress.equals(nextProposer);
  }
Is next proposer.

@param header the header
@return the boolean
consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/CliqueMiningTracker.java