@Override
	protected void init() {
		createActions();
	}
Provides actions for organizing the program tree based on various algorithms.  Currently, there
are two algorithms:
<p>
Dominance: organizes the functions in a program such that a function is in a subtree of another
function if all call paths to that function must past through the parent function.
<p>
Complexity Depth: organizes the functions into "levels" from the bottom up.  All leaf functions 
are in the same lowest level (highest number, call it level N).  All functions that only call 
leaf functions are in the next higher level, N-1.  Functions in the highest level (labeled level
0) are those furthest from the leaves.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/programtree/ProgramTreeModularizationPlugin.java