Javadocs says that we should use boolean array for specifying order but we actually should provide array of ints. -1 for desc and 1 for asc.
Need to provide example as I was trying to put 0 for desc and 1 for asc as the most common substitutes for false and true.
PS 1) tests for sort method of Frame class are not in the corresponding test file. Some test that should have been placed into FrameTest.java are in SortTest.java. Coverage of use cases is low.