@API(status = API.Status.STABLE)
    public int count(final @NonNull String flag) {
        return this.getAll(flag).size();
    }
Returns the number of values associated with the given {@code flag}.

@param flag the flag
@return the number of values associated with the flag
cloud-core/src/main/java/org/incendo/cloud/parser/flag/FlagContext.java