frozenPaneElevation property Null safety
The elevation of the frozen pane line.
This controls the size of the shadow below the frozen pane line.
This is applicable for both the frozen column and row.
If you want to hide the shadow and show only line, you can set this property as 0.0.
Defaults to 5.0. The value is always non-negative.
final double frozenPaneElevation;