public ExtractMethodRefactoring(ICompilationUnit unit,int selectionStart,int selectionLength){
  fCUnit=unit;
  fRoot=null;
  fMethodName="extracted";
  fSelectionStart=selectionStart;
  fSelectionLength=selectionLength;
  fVisibility=-1;
}

public ExtractMethodRefactoring ( ICompilationUnit unit , int selectionStart , int selectionLength ) { fCUnit = unit ; fRoot = null ; fMethodName = "extracted" ; fSelectionStart = selectionStart ; fSelectionLength = selectionLength ; fVisibility = - 1 ; }
creates a new extract method refactoring
