DataFeedSchema interface  
Specifies metrics, dimensions, and timestamp columns of a data feed.
Properties
| dimensions | dimension list | 
| metrics | measure list | 
| timestamp | user-defined timestamp column. if timestampColumn is null, start time of every time slice will be used as default value. | 
Property Details
dimensions
metrics
		timestampColumn
	 
	user-defined timestamp column. if timestampColumn is null, start time of every time slice will be used as default value.
timestampColumn?: stringProperty Value
string