STORE specifies the signature of reference stores.
A reference store is a mutable and reactive key / value store, where keys are names created by users (and/or global names created by convention) and values are keys from the block store.
A typical Irmin application should have a very low number of keys in the reference store.
include RRWReactive read-write stores are read-write stores with reactive capabilities.
include RWupdate t k v replaces the contents of k by v in t. If k is not already defined in t, create a fresh binding. Raise Invalid_argument if k is the empty path.
compare_and_set t key ~test ~set sets key to set only if the current value of key is test and in that case returns true. If the current value of key is different, it returns false. None means that the value does not have to exist or is removed.
Note: The operation is guaranteed to be atomic.
watch_key t k ?init f adds f to the list of t's watch handlers for the key k and returns the watch handler to be used with unwatch. init is the optional initial value of the key.