This class is a configurable attribute that replaces any previously
existing attribute in the container that has the same name.
An important use of this class is to describe icons for visual rendition.
The icons are described in an XML schema called SVG, given in the
body of a configure XML element. The icon description is named
"_iconDescription", and placing such a description into any container
replaces any previous description in the container.
Steve Neuendorffer and Edward A. Lee
$Id: SingletonConfigurableAttribute.java 70402 2014-10-23 00:52:20Z cxh $
Ptolemy II 1.0
Green (eal)
Green (janneck)