update method
Updates the content with the specified data.
The given rootKey is updated with the data value.
The value must consist exclusively of DynamicMap, DynamicList, int,
double, bool, and String objects.
Collections (maps and lists) in value must not be mutated after calling
this method; doing so would leave the DynamicContent in an inconsistent
state.
Implementation
void update(String rootKey, Object value) {
_root.updateKey(rootKey, deepClone(value)!);
_scheduleCleanup();
}