RootCauseunvalidated
accessing `Map` elements doesn't search the prototype. Tension: When using objects, you have to use a method like `hasOwnProperty()` to distinguish properties of the object from properties inherited from the prototype.
2a3f9c80-051d-4aa3-b576-92d20f7b90c3
accessing Map elements doesn't search the prototype. Tension: When using objects, you have to use a method like hasOwnProperty() to distinguish properties of the object from properties inherited from the prototype.