docs: def _title_for_slice(self, truncate=50):
          """
          If the dataarray has 1 dimensional coordinates or comes from a slice
          we can show that info in the title
  
          Parameters
          ----------
          truncate : integer
              maximum number of characters for title
  
          Returns
          -------
          title : string
              Can be used for plot titles
  
          """
          one_dims = []
          for dim, coord in self.coords.items():
              if coord.size == 1:
                  one_dims.append('{dim} = {v}'.format(
                      dim=dim, v=format_item(coord.values)))
  
          title = ', '.join(one_dims)
          if len(title) > truncate:
              title = title[:(truncate - 3)] + '...'
  
          return title