some progress

node_modules/mongoose/lib/error/strictPopulate.js

@@ -0,0 +1,29 @@
+/*!
+ * Module dependencies.
+ */
+
+'use strict';
+
+const MongooseError = require('./');
+
+class StrictPopulateError extends MongooseError {
+  /**
+   * Strict mode error constructor
+   *
+   * @param {String} path
+   * @param {String} [msg]
+   * @inherits MongooseError
+   * @api private
+   */
+  constructor(path, msg) {
+    msg = msg || 'Cannot populate path `' + path + '` because it is not in your schema. ' + 'Set the `strictPopulate` option to false to override.';
+    super(msg);
+    this.path = path;
+  }
+}
+
+Object.defineProperty(StrictPopulateError.prototype, 'name', {
+  value: 'StrictPopulateError'
+});
+
+module.exports = StrictPopulateError;