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diff --git a/school/node_modules/graphql/utilities/extendSchema.d.ts b/school/node_modules/graphql/utilities/extendSchema.d.ts
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+import { Maybe } from '../jsutils/Maybe';
+
+import { Location, DocumentNode, StringValueNode } from '../language/ast';
+import {
+  GraphQLSchemaValidationOptions,
+  GraphQLSchema,
+  GraphQLSchemaNormalizedConfig,
+} from '../type/schema';
+
+interface Options extends GraphQLSchemaValidationOptions {
+  /**
+   * 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;
+
+  /**
+   * Set to true to assume the SDL is valid.
+   *
+   * Default: false
+   */
+  assumeValidSDL?: boolean;
+}
+
+/**
+ * Produces a new schema given an existing schema and a document which may
+ * contain GraphQL type extensions and definitions. The original schema will
+ * remain unaltered.
+ *
+ * Because a schema represents a graph of references, a schema cannot be
+ * extended without effectively making an entire copy. We do not know until it's
+ * too late if subgraphs remain unchanged.
+ *
+ * This algorithm copies the provided schema, applying extensions while
+ * producing the copy. The original schema remains unaltered.
+ *
+ * Accepts options as a third argument:
+ *
+ *    - commentDescriptions:
+ *        Provide true to use preceding comments as the description.
+ *
+ */
+export function extendSchema(
+  schema: GraphQLSchema,
+  documentAST: DocumentNode,
+  options?: Options,
+): GraphQLSchema;
+
+/**
+ * @internal
+ */
+export function extendSchemaImpl(
+  schemaConfig: GraphQLSchemaNormalizedConfig,
+  documentAST: DocumentNode,
+  options?: Options,
+): GraphQLSchemaNormalizedConfig;
+
+/**
+ * Given an ast node, returns its string description.
+ * @deprecated: provided to ease adoption and will be removed in v16.
+ *
+ * Accepts options as a second argument:
+ *
+ *    - commentDescriptions:
+ *        Provide true to use preceding comments as the description.
+ *
+ */
+export function getDescription(
+  node: { readonly description?: StringValueNode; readonly loc?: Location },
+  options?: Maybe<{ commentDescriptions?: boolean }>,
+): string | undefined;