import { DirectiveNode } from 'graphql/language/ast';
import { DirectiveDefinitionNode } from 'graphql';
export declare function mergeDirectives(d1: ReadonlyArray<DirectiveNode>, d2: ReadonlyArray<DirectiveNode>): DirectiveNode[];
export declare function mergeDirective(node: DirectiveDefinitionNode, existingNode?: DirectiveDefinitionNode): DirectiveDefinitionNode;