A test, Foo.java, can contain multiple @test sections which can be executed all together:

jtreg Foo.java

or separately as

jtreg Foo.java#id0
jtreg Foo.java#id01
etc

If such a test is to be excluded, through listing in a ProblemList.txt file for example, then it would be convenient if listing Foo.java excludes all tests, rather than having to list them all individually.