tabName:
            fields:
              topComposite:
                label: " "
                fieldType: composite
                transformerClass: info.magnolia.ui.form.field.transformer.composite.DelegatingCompositeFieldTransformer
                fields:
                  - name: topleft
                    label: Top left
                    fieldType: text
                  - name: topright
                    label: Top right
                    fieldType: text

              bottomComposite:
                label: Bottom
                fieldType: composite
                transformerClass: info.magnolia.ui.form.field.transformer.composite.DelegatingCompositeFieldTransformer
                fields:
                  - name: bottomleft
                    label: Bottom left
                    fieldType: text
                  - name: bottomright
                    label: Bottom right
                    fieldType: text