boolean (@Nls @Nullable String modalTitle) { final String freezeReason = isFreezed(); if (freezeReason == null) return false; if (modalTitle != null) { Messages.showErrorDialog(myProject, freezeReason, modalTitle); } else { VcsBalloonProblemNotifier.showOverChangesView(myProject, freezeReason, MessageType.WARNING); } return true; }