import { type GraphQLCompositeType, type GraphQLInterfaceType, type GraphQLSchema } from 'graphql';
/** Used by `expandFragments` to calculate type relations. Can be created by using {@linkcode createTypeRelationContext}. */
export interface TypeRelationContext {
    readonly doesOverlap: (typeA: GraphQLCompositeType, typeB: GraphQLCompositeType) => boolean;
    readonly interfaceImplements: (parentType: GraphQLInterfaceType, conditionType: GraphQLInterfaceType) => boolean;
}
/**
 * Creates {@linkcode TypeRelationContext} instance for calculating type relations.
 * This instance should always returns same result for same `schema`, so you can re-use
 * if `schema` is unchanged.
 */
export default function createTypeRelationContext(schema: GraphQLSchema): TypeRelationContext;