docs: public ModifyVpcEndpointServicePermissionsRequest withAddAllowedPrincipals(String... addAllowedPrincipals) {
          if (this.addAllowedPrincipals == null) {
              setAddAllowedPrincipals(new com.amazonaws.internal.SdkInternalList<String>(addAllowedPrincipals.length));
          }
          for (String ele : addAllowedPrincipals) {
              this.addAllowedPrincipals.add(ele);
          }
          return this;
      }