headerStyle property
Defines the main axis extent of all of this sliver's children.
The prototypeCell
is laid out before the rest of the sliver's children
and its size along the main axis fixes the size of each child. The
prototypeCell
is essentially Offstage: it is not painted and it
cannot respond to input.
An immutable style describing how to create header
Default is CellStyle.header()
Implementation
//final Widget prototypeCell;
/// An immutable style describing how to create header
/// Default is [CellStyle.header()]
final CellStyle? headerStyle;