writable<T> static method
Creates a WritableBeacon with an initial value.
This beacon allows both reading and writing the value.
Example:
var myBeacon = Beacon.writable(10);
print(myBeacon.value); // Outputs: 10
myBeacon.value = 20;
Implementation
static WritableBeacon<T> writable<T>(T initialValue) =>
WritableBeacon<T>(initialValue);