Framework for generalized mappings from graph attributes
to visual attributes. Graph attributes are either in the
form of the actual nodes and edges of the graph, or in the
form of values stored in one of
{@link cytoscape.CytoscapeWindow CytoscapeWindow}'s two
{@link cytoscape.CyAttributes CyAttributes} instances,
{@link cytoscape.CytoscapeWindow#edgeAttributes edgeAttributes} and
{@link cytoscape.CytoscapeWindow#nodeAttributes nodeAttributes}.
Visual attributes include node color, size, shape, label, edge color,
style, label, etc.