public Builder mergeFrom(com.google.spanner.v1.Transaction other) { if (other == com.google.spanner.v1.Transaction.getDefaultInstance()) return this; if (other.getId() != com.google.protobuf.ByteString.EMPTY) { setId(other.getId()); } if (other.hasReadTimestamp()) { mergeReadTimestamp(other.getReadTimestamp()); } this.mergeUnknownFields(other.unknownFields); onChanged(); return this; }