FileSpan subspan()

in lib/src/file.dart [438:445]

• 7 lines of code
• 5 McCabe index (conditional complexity)

  FileSpan subspan(int start, [int? end]) {
    RangeError.checkValidRange(start, end, length);
    if (start == 0 && (end == null || end == length)) return this;

    final startOffset = this.start.offset;
    return file.span(
        startOffset + start, end == null ? this.end.offset : startOffset + end);
  }