svn: Refactored RepositoryTreeNode - made myChildren @NotNull and final
svn: Refactored RepositoryTreeNode - removed unused methods/parameters, code simplified, @NotNull
svn: Refactored Loader, CacheLoader, RepositoryLoader - @NotNull, removed unused code, code simplified
IDEA-128840 Fixed rendering of "Loading..." node and error nodes in repository browser
RUBY-15651: if the document is empty then we have nothing to scroll
testing ChameleonAction
Merge branch 'svn_18_3'
preparations for new direction (@Nullable result analysis)
minor optimization
preparations for @Nullable method analysis
inference of @Nullable results for simple methods
Preparations for @Nullable method analysis
inference of @Nullable for methods
testing new @Nullable annotations
optimizations
sharing cache within one pass of inference
registry option to control inference of @Nullable methods