Protocol to build data which potentially could be empty
When data is empty data, it build the widget with buildEmpty, which render an empty view by default. When data is not empty, it builds the widget with buildContent, which needs to be implemented by developer.
- Implemented types
BuildContext context, T content) → Widget
- Contract to build view when data isn't empty
BuildContext context, T emptyContent) → Widget
- Contract to build view when data is empty
BuildContext context, T value) → Widget
Behavior implementation of contract of BuildValue
T value) → bool
- Check whether data is empty
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
) → String
A string representation of this object.