private com.google.protobuf.RepeatedFieldBuilder<
          org.bwapi.proxy.messages.TerrainMessages.Region, org.bwapi.proxy.messages.TerrainMessages.Region.Builder, org.bwapi.proxy.messages.TerrainMessages.RegionOrBuilder> 
          getRegionsFieldBuilder() {
        if (regionsBuilder_ == null) {
          regionsBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
              org.bwapi.proxy.messages.TerrainMessages.Region, org.bwapi.proxy.messages.TerrainMessages.Region.Builder, org.bwapi.proxy.messages.TerrainMessages.RegionOrBuilder>(
                  regions_,
                  ((bitField0_ & 0x00000001) == 0x00000001),
                  getParentForChildren(),
                  isClean());
          regions_ = null;
        }
        return regionsBuilder_;
      }