public @interface Experimental
An experimental user-facing API.
Experimental API's might change or be removed in minor versions of Spark, or be adopted as
first-class Spark API's.
NOTE: If there exists a Scaladoc comment that immediately precedes this annotation, the first
line of the comment must be ":: Experimental ::" with no trailing blank line. This is because
of the known issue that Scaladoc displays only either the annotation or the comment, whichever