flow like the river

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

@@ -0,0 +1,8 @@
+import { DocumentNode } from '../language/ast';
+
+/**
+ * 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: ReadonlyArray<DocumentNode>): DocumentNode;