@eddeee888/gcg-typescript-resolver-files/src/utils/isRootObjectType.d.ts

This [GraphQL Code Generator](https://www.the-guild.dev/graphql/codegen) plugin creates resolvers given GraphQL schema.

export type RootObjectType = 'Query' | 'Mutation' | 'Subscription';
export declare const isRootObjectType: (typeName: string) => typeName is RootObjectType;