question: public String toString ( ) { StringBuffer s = new StringBuffer ( ) ; boolean colon = false ; s . append ( "ClassHierarchy:{" ) ; for ( TypeNode typeNode : typeNodeList ) { if ( colon ) { s . append ( "," ) ; } else { colon = true ; } s . append ( typeNode ) ; } s . append ( "}" ) ; return s . toString ( ) ; }
target:  Returns a string representation of this object 