In order to call a plugin from your business object you need to add the plugin to your business object first (see Create Server Side Business Objects) and afterwards access it within a business object Function using this syntax:
Simplifier.plugin.<PluginName>.<SlotName>(payload?: string|object): object
Example:
var repos = Simplifier.plugin.contentRepoPlugin.listRepos(); var newRepo = Simplifier.plugin.contentRepoPlugin.createRepo({name: "MyRepo"}); Simplifier.plugin.contentRepoPlugin.updateRepo("{\"id\": 15}");