import { TypeGenVisitorAddon, CustomScalarInput, CustomScalarOutput, DocumentInput, OperationDefinionInput, FragmentDefinitionInput } from './types';
export declare function mergeAddons(addonList: (TypeGenVisitorAddon | undefined)[]): {
    customScalar: (input: CustomScalarInput) => CustomScalarOutput;
    document: (input: DocumentInput) => void;
    operationDefinition: (input: OperationDefinionInput) => void;
    fragmentDefinition: (input: FragmentDefinitionInput) => void;
};