code: def get_suitable_slot_for_duplicate(self, src_slot):
          
          slot_from = to_int(src_slot, 0)
          if slot_from < 1:
              return -1
  
          # Are the analyses from src_slot suitable for duplicates creation?
          container = self.get_container_at(slot_from)
          if not container or not IAnalysisRequest.providedBy(container):
              # We cannot create duplicates from analyses other than routine ones,
              # those that belong to an Analysis Request.
              return -1
  
          occupied = self.get_slot_positions(type='all')
          wst = self.getWorksheetTemplate()
          if not wst:
              # No worksheet template assigned, add a new slot at the end of
              # the worksheet with the duplicate there
              slot_to = max(occupied) + 1
              return slot_to
  
          # If there is a match with the layout defined in the Worksheet
          # Template, use that slot instead of adding a new one at the end of
          # the worksheet
          layout = wst.getLayout()
          for pos in layout:
              if pos['type'] != 'd' or to_int(pos['dup']) != slot_from:
                  continue
              slot_to = int(pos['pos'])
              if slot_to in occupied:
                  # Not an empty slot
                  continue
  
              # This slot is empty, use it instead of adding a new
              # slot at the end of the worksheet
              return slot_to
  
          # Add a new slot at the end of the worksheet, but take into account
          # that a worksheet template is assigned, so we need to take care to
          # not override slots defined by its layout
          occupied.append(len(layout))
          slot_to = max(occupied) + 1
          return slot_to
docs: Returns the suitable position for a duplicate analysis, taking into
          account if there is a WorksheetTemplate assigned to this worksheet.
  
          By default, returns a new slot at the end of the worksheet unless there
          is a slot defined for a duplicate of the src_slot in the worksheet
          template layout not yet used.
  
          :param src_slot:
          :return: suitable slot position for a duplicate of src_slot