A string that is used as the object for object invocation By default this is empty which effectively invokes objects in the root namespace (window.). This string should reflect a base that supports appending a method or property acces, meaning it usually will end in a . (except for root/empty) such as object.property.

For other components this might be an root object. In the MM editor for example it's:

window.textEditor.

public string BaseInvocationTargetString { get; set; }