// PartialOverrideValue is like OverrideValue but marks the override as mergeable.
func (d *MemoryClient) PartialOverrideValue(key Key, value any) (cleanup func()) {
memory_client.go
return d.overrideValue(key, value, true)
}
func (d *MemoryClient) overrideValue(key Key, value any, mergeable bool) (cleanup func()) {