public String getVertexColorOverrideAttributeKey() {
		return vertexColorOverride;
	}
Returns the attribute key that can be used to override the color of a vertex. Normally,
a vertex is colored based on its vertex type. However, if this value is non-null, a vertex
can override its color by setting an attribute using this key name.
@return the attribute key that can be used to override the color of a vertex
Ghidra/Framework/Graph/src/main/java/ghidra/service/graph/GraphDisplayOptions.java