question: private String buildToolTip ( final List < NaviNode > nodes ) { final StringBuilder tooltip = new StringBuilder ( "<html>" ) ; boolean first = true ; for ( final NaviNode graphNode : nodes ) { if ( ! first ) { tooltip . append ( "<br>" ) ; } tooltip . append ( CNodesDisplayString . getDisplayString ( graphNode ) ) ; first = false ; } return tooltip + "</html>" ; }
target:  Builds the tooltip for used for nodes that represent multiple graph nodes.