function LoneSchemaDefinition
import { LoneSchemaDefinition } from "https://dotland.deno.dev/x/graphql_deno@v15.0.0/lib/validation/rules/LoneSchemaDefinition.d.ts";

Lone Schema definition

A GraphQL document is only valid if it contains only one schema definition.

Parameters

context: SDLValidationContext

Returns

ASTVisitor