im creating a custom unity package.
My package uses EditorCoroutines https://docs.unity3d.com/Manual/com.unity.editorcoroutines.html and when I export my package and then import in to an empty project I get this compiler error: error CS0234: The type or namespace name 'EditorCoroutines' does not exist in the namespace 'Unity'
Any ideas how I include the EditorCoroutine as a dependency for my custom package?