@NotNull
 public static String loadFile(
     @NotNull File file, @Nullable @NonNls String encoding, boolean convertLineSeparators)
     throws IOException {
   return FileUtilRt.loadFile(file, encoding, convertLineSeparators);
 }
 @NotNull
 public static String loadFile(@NotNull File file, boolean convertLineSeparators)
     throws IOException {
   return FileUtilRt.loadFile(file, convertLineSeparators);
 }
 @NotNull
 public static String loadFile(@NotNull File file, @Nullable @NonNls String encoding)
     throws IOException {
   return FileUtilRt.loadFile(file, encoding);
 }
 @NotNull
 public static String loadFile(@NotNull File file) throws IOException {
   return FileUtilRt.loadFile(file);
 }