Looking at the documentation of Alexa.DeviceUsage.Meter, it says to "include a
configurations object that contains an
energySources object". The example also shows that the discovery response includes a configurations (with an 's') in that capability object. However, all other capabilities' documents say to use "configuration" instead of "configurations". The document of the Capability object schema also says to use "configuration". Is it intentional that the Alexa.DeviceUsage.Meter uses "configurations"? Does it accept "configuration"?