flow like the river

BACK_BACK/node_modules/graphql/validation/rules/KnownFragmentNamesRule.js

@@ -0,0 +1,27 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.KnownFragmentNamesRule = KnownFragmentNamesRule;
+
+var _GraphQLError = require("../../error/GraphQLError.js");
+
+/**
+ * Known fragment names
+ *
+ * A GraphQL document is only valid if all `...Fragment` fragment spreads refer
+ * to fragments defined in the same document.
+ */
+function KnownFragmentNamesRule(context) {
+  return {
+    FragmentSpread: function FragmentSpread(node) {
+      var fragmentName = node.name.value;
+      var fragment = context.getFragment(fragmentName);
+
+      if (!fragment) {
+        context.reportError(new _GraphQLError.GraphQLError("Unknown fragment \"".concat(fragmentName, "\"."), node.name));
+      }
+    }
+  };
+}