public BuildableType.Builder mergeBuilder(MergeBuilderMethod mergeBuilder) {
    this.mergeBuilder = Objects.requireNonNull(mergeBuilder);
    _unsetProperties.remove(Property.MERGE_BUILDER);
    return (BuildableType.Builder) this;
  }
public BuildableType . Builder mergeBuilder ( MergeBuilderMethod mergeBuilder ) { this . mergeBuilder = Objects . requireNonNull ( mergeBuilder ) ; _unsetProperties . remove ( Property . MERGE_BUILDER ) ; return ( BuildableType . Builder ) this ; }
Sets the value to be returned by {@link BuildableType#mergeBuilder()}.

@return this {@code Builder} object
@throws NullPointerException if {@code mergeBuilder} is null