default @Nullable String getMetaValue(@NonNull String key) {
        return queryMetaValue(key).result();
    }
Gets a value for the given meta key.

<p>If no such meta value exists for the given key, {@code null} is returned.</p>

@param key the key
@return the value
api/src/main/java/net/luckperms/api/cacheddata/CachedMetaData.java