@Retention(value=RUNTIME)
@Target(value={TYPE,FIELD,METHOD,PARAMETER,CONSTRUCTOR,LOCAL_VARIABLE,PACKAGE})
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 "" with no trailing blank line. This is because
of the known issue that Scaladoc displays only either the annotation or the comment, whichever
comes first.