code: def get(cls):
          
          if cls.is_twoconspect:
              return cls.subconspect_el.value or None
  
          input_value = cls.input_el.value.strip()
  
          # blank user input -> no value was yet set
          if not input_value:
              return None
  
          mdt = conspectus.mdt_by_name.get(input_value)
  
          if not mdt:
              alert("Invalid sub-conspect `%s`!" % input_value)
              return None
  
          return mdt
docs: Get code selected by user.
  
          Returns:
              str: Code or None in case that user didn't selected anything yet.