read-only
Returns the estimated total height of the children, in pixels.
If null, the estimate will be infinite, even if a null child has been returned by builder.
See LazyBlockDelegate.estimateTotalExtent for details.
Returns the estimated total height of the children, in pixels.
If null, the estimate will be infinite, even if a null child has been returned by builder.
See LazyBlockDelegate.estimateTotalExtent for details.