public static boolean isNarrowingConversion(@Nullable PsiType sourceType, @Nullable PsiType targetType) {
    final Integer sourcePrecision = typePrecisions.get(sourceType);
    final Integer targetPrecision = typePrecisions.get(targetType);
    return sourcePrecision != null && targetPrecision != null && targetPrecision.intValue() < sourcePrecision.intValue();
  }
public static boolean isNarrowingConversion(@Nullable PsiType sourceType, @Nullable PsiType targetType)