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Module

x/kilatgraphql/mod.ts>SingleFieldSubscriptionsRule

Graphql middleware
graphteon/kilat-graphql
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function SingleFieldSubscriptionsRule
import { SingleFieldSubscriptionsRule } from "https://deno.land/x/kilatgraphql@16.6.0/mod.ts";

Subscriptions must only include a non-introspection field.

A GraphQL subscription is valid only if it contains a single root field and that root field is not an introspection field.

See https://spec.graphql.org/draft/#sec-Single-root-field