@NotNull
  static LongRangeSet extractRange(@NotNull DfType type) {
    return type instanceof DfIntegralType ? ((DfIntegralType)type).getRange().meet(DfIntRangeType.FULL_RANGE) :
           DfIntRangeType.FULL_RANGE;
  }
@NotNull
  static LongRangeSet extractRange(@NotNull DfType type)