public double getLabelPosition() {
		return .5;
	}
Gets the relative amount of margin space to allocate above the label. The default is
0.5 which will center the label in the associated shape. A value closer to 0 will move
the label closer to the top and a value closer to 1 will move the label closer to the 
bottom.
@return the relative amount of margin space to allocate obove the label.s
Ghidra/Framework/Graph/src/main/java/ghidra/service/graph/VertexShape.java