/// <summary>
/// Header Section. This overridden version displays the Add Object Field.
/// </summary>
/// <param name="property">The main SerializedProperty the list belongs to</param>
/// <param name="listProperty">The list SerializedProperty that has the associated array attached.</param>
/// <param name="label">Label provided to the main PropertyField</param>
protected override void HeaderSection(GUIContent label)
{
T go = null;
if ((go = AddObjectField(go)) != null)
{
int newItemIndex = ListProperty.arraySize;
ListProperty.InsertArrayElementAtIndex(newItemIndex);
ListProperty.GetArrayElementAtIndex(newItemIndex).objectReferenceValue = go;
}
}