public Set<SootMethod> collectSourceMethods(){
  Set<SootMethod> result=new HashSet<SootMethod>();
  for (  SourceCallChainInfo cci : entry_points) {
    collectSourceMethods(cci,result);
  }
  return result;
}

public Set < SootMethod > collectSourceMethods ( ) { Set < SootMethod > result = new HashSet < SootMethod > ( ) ; for ( SourceCallChainInfo cci : entry_points ) { collectSourceMethods ( cci , result ) ; } return result ; }
returns a set of source methods included in the source call tree .
