Key

-- @param name The name of the key storaged
-- @return the value associated with the key or an empty string if the key does not exists 
get_key(name)

-- example usage:

local my_value = get_key("my_key")

-- @param key The key name to be storaged
-- @param value The value to be storaged
set_key(key, value)

-- example usage:

set_key("my_key", 123)

-- @param name The name of the key to be removed
-- @return the value the value that was removed or an empty string if the key does not exists 
remove_key(name)

-- example usage:

local removed_value = remove_key("my_key")