Someone

collections {
   group {
      min: 64 64;
      max: 128 128;
      name: "rect";
      parts {
         part {
            name: "Rectangle";
            type: RECT;
            description {
               state: "default" 0.0;
               color: 255 0 0 255;
            }
         }
      }
   }

   group {
      name: "table";
      parts {
         part {
            name: "table";
            type: TABLE;
            description {
               state: "default" 0.0;
               table {
                  homogeneous: TABLE;
                  padding: 16 16;
               }
            }
            table {
               items {
                  item {
                     type: GROUP;
                     source: "rect";
                     position: 0 0;
                     aspect: 1 1;
                     aspect_mode: BOTH;
                     align: -1 -1;
                  }
                  item {
                     type: GROUP;
                     source: "rect";
                     position: 1 0;
                     aspect: 1 1;
                     aspect_mode: BOTH;
                     align: -1 -1;
                  }
               }
            }
         }
      }
   }
}