module Y = [%graphql {|
    mutation y($foo: String!) {
        y(foo: $bar) {
          bar
        }
      }
|}];

let component = ReasonReact.statelessComponent("Greeting");
module Mutation = Apollo.Client.Mutation;

let make = (_children) => {
...component,
render: (_) => {
    <Mutation>
    ((mutate, response) => {
      let mutation = Y.make(~foo="bar", ());
      switch response {
         | NotCalled => {
            mutate(mutation);
            <div> (ReasonReact.stringToElement("Loading")) </div>
         }
         | Loading => <div> (ReasonReact.stringToElement("Loading")) </div>
         | Failed(error) => <div> (ReasonReact.stringToElement(error)) </div>
         | Loaded(result) => {
             let parse = mutation##parse;
             let bar = parse(result)##y;
             let o = Json.Decode.({
                "foo": bar |> field("foo", string)
              });
         }
    }})
  </Mutation>
}
};