default implementation will display all the triples exposed by the graph (ie
including reification triples if it is Standard).
*/
public static String toString( String prefix, Graph that )
{
PrefixMapping pm = that.getPrefixMapping();
StringBuffer b = new StringBuffer( prefix + " {" );
int count = 0;
String gap = "";
ClosableIterator<Triple> it = GraphUtil.findAll( that );
while (it.hasNext() && count < TOSTRING_TRIPLE_LIMIT)