flow like the river

BACK_BACK/node_modules/graphql/error/locatedError.js.flow

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+// @flow strict
+import inspect from '../jsutils/inspect';
+
+import type { ASTNode } from '../language/ast';
+
+import { GraphQLError } from './GraphQLError';
+
+/**
+ * Given an arbitrary value, presumably thrown while attempting to execute a
+ * GraphQL operation, produce a new GraphQLError aware of the location in the
+ * document responsible for the original Error.
+ */
+export function locatedError(
+  rawOriginalError: mixed,
+  nodes: ASTNode | $ReadOnlyArray<ASTNode> | void | null,
+  path?: ?$ReadOnlyArray<string | number>,
+): GraphQLError {
+  // Sometimes a non-error is thrown, wrap it as an Error instance to ensure a consistent Error interface.
+  const originalError: Error | GraphQLError =
+    rawOriginalError instanceof Error
+      ? rawOriginalError
+      : new Error('Unexpected error value: ' + inspect(rawOriginalError));
+
+  // Note: this uses a brand-check to support GraphQL errors originating from other contexts.
+  if (Array.isArray(originalError.path)) {
+    return (originalError: any);
+  }
+
+  return new GraphQLError(
+    originalError.message,
+    (originalError: any).nodes ?? nodes,
+    (originalError: any).source,
+    (originalError: any).positions,
+    path,
+    originalError,
+  );
+}