90     Other(String),
101     in_memory_data: HashMap<String, Vec<u8>>,
107     in_memory_data: HashMap<String, Vec<u8>>,
120         K: Into<String>,  in in_memory_data()  argument
140     in_memory_data: HashMap<String, Vec<u8>>,
164     fn open(&mut self, identifier: String) -> Result<Resource<Bucket>, Error> {  in open()
183     fn get(&mut self, bucket: Resource<Bucket>, key: String) -> Result<Option<Vec<u8>>, Error> {  in get()
188     fn set(&mut self, bucket: Resource<Bucket>, key: String, value: Vec<u8>) -> Result<(), Error> {  in set()  argument
194     fn delete(&mut self, bucket: Resource<Bucket>, key: String) -> Result<(), Error> {  in delete()
200     fn exists(&mut self, bucket: Resource<Bucket>, key: String) -> Result<bool, Error> {  in exists()
211         let keys: Vec<String> = bucket.in_memory_data.keys().cloned().collect();  in list_keys()
230         key: String,  in increment()  argument
238         let current_value = String::from_utf8(value.clone())  in increment()
252         keys: Vec<String>,  in get_many()  argument
253     ) -> Result<Vec<Option<(String, Vec<u8>)>>, Error> {  in get_many()  argument
269         key_values: Vec<(String, Vec<u8>)>,  in set_many()  argument
278     fn delete_many(&mut self, bucket: Resource<Bucket>, keys: Vec<String>) -> Result<(), Error> {  in delete_many()