空安全里面有警告，代码写的不严谨

[hlovingness]

Pub/Cache/hosted/pub.flutter-io.cn/flutter_datetime_picker-1.5.1/lib/flutter_datetime_picker.dart:311:32: Warning: Operand of null-aware operation '??' has type 'Color' which excludes null.
 - 'Color' is from 'dart:ui'.
                  color: theme.backgroundColor ?? Colors.white,

[palorotolo]

/C:/SDK/FlutterSDK/flutter_windows_2.10.0-stable/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_datetime_picker-1.5.1/lib/flutter_datetime_picker.dart:311:32: Warning: Operand of null-aware operation '??' has type 'Color' which excludes null.

• 'Color' is from 'dart:ui'. color: theme.backgroundColor ?? Colors.white,

[Huuuuuub]

你好，你用的这个插件，有发现会不停的闪烁的问题吗？https://github.com/Realank/flutter_datetime_picker/issues/340