merge method
Implementation
void merge(CachedDataMap<T> others) {
others._cachedDataMap.forEach((k, v) {
addWithKey(k, v.value, v.ts);
});
}
void merge(CachedDataMap<T> others) {
others._cachedDataMap.forEach((k, v) {
addWithKey(k, v.value, v.ts);
});
}