+
+ /**
+ * @brief Get a particular user's config variable given the category name
+ * ($cat) and a $key.
+ *
+ * Get a particular config value from the given category ($cat)
+ * and the $key from a cached storage either from the $this->configAdapter
+ * (@see IConfigAdapter ) or from the $this->configCache (@see IConfigCache ).
+ *
+ * @param string $cat The category of the configuration value
+ * @param string $key The configuration key to query
+ * @param mixed $default_value optional, The value to return if key is not set (default: null)
+ * @param boolean $refresh optional, If true the config is loaded from the db and not from the cache (default: false)
+ *
+ * @return mixed Stored value or null if it does not exist
+ */