code: def assigned_librefs(self):
          
  
          code = """
          data _null_; retain libref; retain cobs 1; 
             set sashelp.vlibnam end=last;
             if cobs EQ 1 then
                put "LIBREFSSTART";
             cobs = 2;
             if libref NE libname then
                put "LIBREF=" libname;
             libref = libname;
             if last then
                put "LIBREFSEND";
          run;
          """
  
          if self.nosub:
              print(code)
              return None
          else:
             ll = self.submit(code, results='text')
  
          librefs = []
          log = ll['LOG'].rpartition('LIBREFSEND')[0].rpartition('LIBREFSSTART')
                                                                                    
          for i in range(log[2].count('LIBREF=')):                                    
             log = log[2].partition('LIBREF=')[2].partition('\n')                    
             librefs.append(log[0].strip())                                                         
                                                                                    
          return librefs
docs: This method returns the list of currently assigned librefs