import { CoreSchemaContext, Feature } from '@apollo/core-schema';
export declare const ErrUnsupportedFeature: (feature: Feature) => import("@apollo/core-schema/dist/error").GraphQLErrorExt<"UnsupportedFeature"> & {
    message: string;
    feature: Feature;
    nodes: import("graphql").DirectiveNode[];
};
export declare const ErrForUnsupported: (core: Feature, ...features: readonly Feature[]) => import("@apollo/core-schema/dist/error").GraphQLErrorExt<"ForUnsupported"> & {
    message: string;
    features: readonly Feature[];
    nodes: import("graphql").DirectiveNode[];
};
export declare function featureSupport(this: CoreSchemaContext): void;
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