public <V> @This @NonNull CommandMetaBuilder with(
            final @NonNull CloudKey<V> key,
            final @NonNull V value
    ) {
        this.map.put(key, value);
        return this;
    }
Stores the given {@code key}-{@code value} pair.

@param <V>   the value type
@param key   the key
@param value the value
@return {@code this}
cloud-core/src/main/java/org/incendo/cloud/meta/CommandMetaBuilder.java