graphql/utilities/printSchema.d.ts

import { GraphQLSchema } from '../type/schema';
import { GraphQLNamedType } from '../type/definition';

export interface Options {
  /**
   * Descriptions are defined as preceding string literals, however an older
   * experimental version of the SDL supported preceding comments as
   * descriptions. Set to true to enable this deprecated behavior.
   * This option is provided to ease adoption and will be removed in v16.
   *
   * Default: false
   */
  commentDescriptions?: boolean;
}

/**
 * Accepts options as a second argument:
 *
 *    - commentDescriptions:
 *        Provide true to use preceding comments as the description.
 *
 */
export function printSchema(schema: GraphQLSchema, options?: Options): string;

export function printIntrospectionSchema(
  schema: GraphQLSchema,
  options?: Options,
): string;

export function printType(type: GraphQLNamedType, options?: Options): string;