code: func NewLedgerCommitterReactive(ledger PeerLedgerSupport, eventer ConfigBlockEventer) *LedgerCommitter {
  	return &LedgerCommitter{PeerLedgerSupport: ledger, eventer: eventer}
  }
docs: // NewLedgerCommitterReactive is a factory function to create an instance of the committer
  // same as way as NewLedgerCommitter, while also provides an option to specify callback to
  // be called upon new configuration block arrival and commit event