[−][src]Trait cosmwasm_std::Storage 
            Required methods
fn set(&mut self, key: &[u8], value: &[u8])
fn remove(&mut self, key: &[u8])
Removes a database entry at key.
The current interface does not allow to differentiate between a key that existed before and one that didn't exist. See https://github.com/CosmWasm/cosmwasm/issues/290