flow like the river

BACK_BACK/node_modules/mongoose/lib/options/SchemaSubdocumentOptions.js

@@ -0,0 +1,42 @@
+'use strict';
+
+const SchemaTypeOptions = require('./SchemaTypeOptions');
+
+/**
+ * The options defined on a single nested schematype.
+ *
+ * #### Example:
+ *
+ *     const schema = Schema({ child: Schema({ name: String }) });
+ *     schema.path('child').options; // SchemaSubdocumentOptions instance
+ *
+ * @api public
+ * @inherits SchemaTypeOptions
+ * @constructor SchemaSubdocumentOptions
+ */
+
+class SchemaSubdocumentOptions extends SchemaTypeOptions {}
+
+const opts = require('./propertyOptions');
+
+/**
+ * If set, overwrites the child schema's `_id` option.
+ *
+ * #### Example:
+ *
+ *     const childSchema = Schema({ name: String });
+ *     const parentSchema = Schema({
+ *       child: { type: childSchema, _id: false }
+ *     });
+ *     parentSchema.path('child').schema.options._id; // false
+ *
+ * @api public
+ * @property of
+ * @memberOf SchemaSubdocumentOptions
+ * @type {Function|string}
+ * @instance
+ */
+
+Object.defineProperty(SchemaSubdocumentOptions.prototype, '_id', opts);
+
+module.exports = SchemaSubdocumentOptions;