import { IntrospectionQuery, GraphQLSchema, GraphQLType, GraphQLNonNull, GraphQLList, GraphQLEnumType } from 'graphql';
export declare type PossibleIntrospectionInputs = {
    data: IntrospectionQuery;
} | IntrospectionQuery;
export declare type PossibleSchemaInput = GraphQLSchema | string | PossibleIntrospectionInputs;
export declare function isIntrospectionResult(schema: PossibleIntrospectionInputs): schema is IntrospectionQuery;
export declare const schemaFromInputs: (schema: PossibleSchemaInput) => GraphQLSchema;
export declare function isNonNullable(type: GraphQLType): type is GraphQLNonNull<any>;
export declare function isList(type: GraphQLType): type is GraphQLList<any>;
export declare function isEnum(type: GraphQLType): type is GraphQLEnumType;