addView method
- Object state,
- RenderFunc func
Implementation
void addView(Object state,RenderFunc func) {
assert(svMap["$state"] == null,"state $state already assigned to view");
assert((state is String) || (sf.enumTypes[0] == state.runtimeType),"invalid view $state type ${state.runtimeType} s/b ${sf.enumTypes[0]}");
assert(!(state is String) || (state == "defRender"),"Only defRender can be a string, not $state");
svMap["$state"] = func;
}