This is an attribute that produces a custom node controller that adds
context menu commands to highlight dependents and prerequisites.
A dependent is a downstream actor, and a prerequisite is an upstream
actor. To use this, drop it onto any actor. The context menu (right click
or command click) acquires four additional commands to highlight or clear
highlights on dependents or prerequisites.
Edward A. Lee
$Id: DependencyHighlighter.java 70402 2014-10-23 00:52:20Z cxh $
Ptolemy II 8.0
Red (eal)
Red (johnr)
The highlight color.