code: def to_nullable_array(value):
          
          # Shortcuts
          if value == None:
              return None
          if type(value) == list:
              return value 
  
          if type(value) in [tuple, set]:
              return list(value)
              
          return [value]
docs: Converts value into array object.
          Single values are converted into arrays with a single element.
  
          :param value: the value to convert.
  
          :return: array object or None when value is None.