Gets an Extension object given its id.
Extension.
Is used to represent an Extension for catalog of extension.
id -- id of an extension. type -- type of an extension (products, hub or multiaccount). name -- name of an extension. owner -- Connect account who owns this extension. environment -- Environment. catalog_status -- catalog status of an extension in auth. short_description -- short description of an extension. overview -- overview of an extension. category -- category of an extension. website -- website for an extension. installed -- installation status of an extension for user. installation -- installation info of an extension for user. icon -- icon of an extension. events -- updated event.