private String getVertexShapeName(String vertexType) {
		VertexShape vertexShape = vertexShapeMap.getOrDefault(vertexType, defaultVertexShape);
		return vertexShape.getName();
	}
Sets the vertex color using a theme color id. By using a theme color id, this property
is eligible to be registered as a tool option.
@param vertexType the vertex type for which to set its color
@param themeColorId the theme color id of the color for this vertex type
Ghidra/Framework/Graph/src/main/java/ghidra/service/graph/GraphDisplayOptions.java