code: def dimension_name(dimension):
      
      if isinstance(dimension, Dimension):
          return dimension.name
      elif isinstance(dimension, basestring):
          return dimension
      elif isinstance(dimension, tuple):
          return dimension[0]
      elif isinstance(dimension, dict):
          return dimension['name']
      elif dimension is None:
          return None
      else:
          raise ValueError('%s type could not be interpreted as Dimension. '
                           'Dimensions must be declared as a string, tuple, '
                           'dictionary or Dimension type.'
                           % type(dimension).__name__)
docs: Return the Dimension.name for a dimension-like object.
  
      Args:
          dimension: Dimension or dimension string, tuple or dict
  
      Returns:
          The name of the Dimension or what would be the name if the
          input as converted to a Dimension.