types:
- name: struct
  map:
    fields:
    - name: fields
      type:
        list:
          elementType:
            namedType: structField
          elementRelationship: associative
          keys: [ "name" ]
    - name: elementRelationship
      type:
        scalar: string
- name: structField
  map:
    fields:
    - name: name
      type:
        scalar: string
    - name: type
      type:
        namedType: typeRef