flow like the river

VISUALIZACION/node_modules/graphql/validation/rules/LoneAnonymousOperationRule.mjs

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+import { GraphQLError } from "../../error/GraphQLError.mjs";
+import { Kind } from "../../language/kinds.mjs";
+
+/**
+ * Lone anonymous operation
+ *
+ * A GraphQL document is only valid if when it contains an anonymous operation
+ * (the query short-hand) that it contains only that one operation definition.
+ */
+export function LoneAnonymousOperationRule(context) {
+  var operationCount = 0;
+  return {
+    Document: function Document(node) {
+      operationCount = node.definitions.filter(function (definition) {
+        return definition.kind === Kind.OPERATION_DEFINITION;
+      }).length;
+    },
+    OperationDefinition: function OperationDefinition(node) {
+      if (!node.name && operationCount > 1) {
+        context.reportError(new GraphQLError('This anonymous operation must be the only defined operation.', node));
+      }
+    }
+  };
+}