flow like the river

BACK_BACK/node_modules/graphql/utilities/findBreakingChanges.d.ts

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+import { GraphQLSchema } from '../type/schema';
+
+export const BreakingChangeType: {
+  TYPE_REMOVED: 'TYPE_REMOVED';
+  TYPE_CHANGED_KIND: 'TYPE_CHANGED_KIND';
+  TYPE_REMOVED_FROM_UNION: 'TYPE_REMOVED_FROM_UNION';
+  VALUE_REMOVED_FROM_ENUM: 'VALUE_REMOVED_FROM_ENUM';
+  REQUIRED_INPUT_FIELD_ADDED: 'REQUIRED_INPUT_FIELD_ADDED';
+  IMPLEMENTED_INTERFACE_REMOVED: 'IMPLEMENTED_INTERFACE_REMOVED';
+  FIELD_REMOVED: 'FIELD_REMOVED';
+  FIELD_CHANGED_KIND: 'FIELD_CHANGED_KIND';
+  REQUIRED_ARG_ADDED: 'REQUIRED_ARG_ADDED';
+  ARG_REMOVED: 'ARG_REMOVED';
+  ARG_CHANGED_KIND: 'ARG_CHANGED_KIND';
+  DIRECTIVE_REMOVED: 'DIRECTIVE_REMOVED';
+  DIRECTIVE_ARG_REMOVED: 'DIRECTIVE_ARG_REMOVED';
+  REQUIRED_DIRECTIVE_ARG_ADDED: 'REQUIRED_DIRECTIVE_ARG_ADDED';
+  DIRECTIVE_REPEATABLE_REMOVED: 'DIRECTIVE_REPEATABLE_REMOVED';
+  DIRECTIVE_LOCATION_REMOVED: 'DIRECTIVE_LOCATION_REMOVED';
+};
+
+export const DangerousChangeType: {
+  VALUE_ADDED_TO_ENUM: 'VALUE_ADDED_TO_ENUM';
+  TYPE_ADDED_TO_UNION: 'TYPE_ADDED_TO_UNION';
+  OPTIONAL_INPUT_FIELD_ADDED: 'OPTIONAL_INPUT_FIELD_ADDED';
+  OPTIONAL_ARG_ADDED: 'OPTIONAL_ARG_ADDED';
+  IMPLEMENTED_INTERFACE_ADDED: 'IMPLEMENTED_INTERFACE_ADDED';
+  ARG_DEFAULT_VALUE_CHANGE: 'ARG_DEFAULT_VALUE_CHANGE';
+};
+
+export interface BreakingChange {
+  type: keyof typeof BreakingChangeType;
+  description: string;
+}
+
+export interface DangerousChange {
+  type: keyof typeof DangerousChangeType;
+  description: string;
+}
+
+/**
+ * Given two schemas, returns an Array containing descriptions of all the types
+ * of breaking changes covered by the other functions down below.
+ */
+export function findBreakingChanges(
+  oldSchema: GraphQLSchema,
+  newSchema: GraphQLSchema,
+): Array<BreakingChange>;
+
+/**
+ * Given two schemas, returns an Array containing descriptions of all the types
+ * of potentially dangerous changes covered by the other functions down below.
+ */
+export function findDangerousChanges(
+  oldSchema: GraphQLSchema,
+  newSchema: GraphQLSchema,
+): Array<DangerousChange>;