WIP - add extractor, generate snippet_data

node_modules/graphql/utilities/concatAST.mjs

@@ -0,0 +1,15 @@
+import flatMap from '../polyfills/flatMap';
+
+/**
+ * Provided a collection of ASTs, presumably each from different files,
+ * concatenate the ASTs together into batched AST, useful for validating many
+ * GraphQL source files which together represent one conceptual application.
+ */
+export function concatAST(asts) {
+  return {
+    kind: 'Document',
+    definitions: flatMap(asts, function (ast) {
+      return ast.definitions;
+    })
+  };
+}