Add javadoc.
Modify test to verify that result is indeterministic.
Split tests.
Allow contains operator to accept Object.
Add test for contains operator in parallel.
Add tests for any operator.
Implements any parameter that is executed in parallel.
Fix test.
Implements contains operator that is executed in parallel.
Fix javadoc.
Correct name of test.
Correct test.
Implement indicesOf/indicesWhere operator.
Rename.
Rename.