The IMAGECOLLAPSED attribute sets the global icon to be used when a tree node is collapsed.
IMAGECOLLAPSED = "image-name"
This attribute is used in the definition of a TREE container, to define the icon to be used for nodes that are collapsed.
It overwrites the program array image defined by IMAGECOLUMN, if both are used.
This attribute is optional.
For more details about image resource specification, see Providing the image resource.