StoreCell<T> constructor
Create a StoreCell which observes and saves the value of argCell
If changesOnly
is true, the returned cell only notifies its observers
if its value has actually changed.
The returned cell is identified by key
if it is non-null. Otherwise if
key
is null, the returned cell has a key which uniquely identifies the
StoreCell for a given argCell
.
Implementation
StoreCell(this.argCell, {
this.changesOnly = false,
dynamic key,
}) : super(key: key ?? _StoreCellKey(argCell));