docs: public ListVPCEConfigurationsResult withVpceConfigurations(VPCEConfiguration... vpceConfigurations) {
          if (this.vpceConfigurations == null) {
              setVpceConfigurations(new java.util.ArrayList<VPCEConfiguration>(vpceConfigurations.length));
          }
          for (VPCEConfiguration ele : vpceConfigurations) {
              this.vpceConfigurations.add(ele);
          }
          return this;
      }