@NotNull
  public static Map<DebuggerSession, Map<String, HotSwapFile>> scanForModifiedClasses(@NotNull List<DebuggerSession> sessions,
                                                                                      @NotNull HotSwapProgress swapProgress) {
    return scanForModifiedClasses(sessions, null, swapProgress);
  }
@NotNull
  public static Map<DebuggerSession, Map<String, HotSwapFile>> scanForModifiedClasses(@NotNull List<DebuggerSession> sessions,
                                                                                      @NotNull HotSwapProgress swapProgress)