private void ensureStaticGeysersIsMutable() {
        if (!((bitField0_ & 0x00000002) == 0x00000002)) {
          staticGeysers_ = new java.util.ArrayList<org.bwapi.proxy.messages.GameMessages.UnitId>(staticGeysers_);
          bitField0_ |= 0x00000002;
         }
      }