Function async_graphql_warp::graphql_subscription_with_data

pub fn graphql_subscription_with_data<Query, Mutation, Subscription, F>(
    schema: Schema<Query, Mutation, Subscription>, 
    initializer: Option<F>
) -> impl Filter<Extract = (impl Reply,), Error = Rejection> + Clone where
    Query: ObjectType + Sync + Send + 'static,
    Mutation: ObjectType + Sync + Send + 'static,
    Subscription: SubscriptionType + Send + Sync + 'static,
    F: FnOnce(Value) -> Result<Data> + Send + Sync + Clone + 'static, 

GraphQL subscription filter

Specifies that a function converts the init payload to data.