PsiFile @NotNull [] getFilesWithWord(@NotNull String word,
                                       @MagicConstant(flagsFromClass = UsageSearchContext.class) short occurenceMask,
                                       @NotNull GlobalSearchScope scope,
                                       boolean caseSensitively);
PsiFile @NotNull [] getFilesWithWord(@NotNull String word,
                                       @MagicConstant(flagsFromClass = UsageSearchContext.class) short occurenceMask,
                                       @NotNull GlobalSearchScope scope,
                                       boolean caseSensitively)