# Group Binding Plugin ## Group Binding Plugin Please note that this plugin isn't enabled by default and you have to load it yourself. Sometimes you just want an easy access to an `IObservableGroup` based on a group without having to start injecting a `IObservableGroupManager` by hand every time to provide you with it. Using this Plugin enables you to just add a `FromGroupAttribute` or a `FromComponentsAttribute` to any public field or any property with a public setter of the type `IObservableGroup` on your system. If your system is an `IGroupSystem` you can also use the `FromGroupAttribute` without even supplying a group to it and it'll fall back to using the value from the `IGroupSystem.Group`. ## System Affinities in this plugin Please refer to the article about system affinities within the performance category for general info about the concept. By accompanying your `FromGroupAttribute`/ `FromComponentsAttribute` by a `CollectionAffinityAttribute` you can specify which collectionIds are to be observed the specified group. If you are using the `FromGroupAttribute` without supplying any arguments, it'll also consider a `CollectionAffinityAttribute` on your systems class. However you can still overwrite this by also supplying a `CollectionAffinityAttribute` to that member. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ecsrx.gitbook.io/project/plugins/group-binding-plugin.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.