var instance = new Vintasoft.Imaging.Annotation.UI.Panels.WebUiAnnotationListPanelJS(settings, stateButton);

var value; // Type: function
value = instance.get_CreateAnnotationContentCallback();

function get_CreateAnnotationContentCallback() : Function;

A function, which returns UI elements for the annotation list record, OR "null".
Here is function prototype "function __createAnnotationContent(annotation, annotationCollection)", where "annotation" parameter is an instance of WebAnnotationViewJS type, "annotationCollection" parameter is an instance of WebAnnotationViewCollectionJS type. Important: "__createAnnotationContent" function must return not empty array of WebUiElementJS objects.