boolean (@NotNull ChangeListFilteringStrategy filteringStrategy) { if (myInnerSplitter.canAdd()) { filteringStrategy.addChangeListener(myFilterChangeListener); final CommittedChangesFilterKey key = filteringStrategy.getKey(); myFilteringStrategy.addStrategy(key, filteringStrategy); myFilteringStrategy.setFilterBase(myChangeLists); final JComponent filterUI = filteringStrategy.getFilterUI(); if (filterUI != null) { myInnerSplitter.add(key, filterUI); } return true; } return false; }