code: def transform_attrs(obj, keys, container, func, extras=None):
      
      cpextras = extras
  
      for reportlab, css in keys:
          extras = cpextras
          if extras is None:
              extras = []
          elif not isinstance(extras, list):
              extras = [extras]
          if css in container:
              extras.insert(0, container[css])
              setattr(obj,
                      reportlab,
                      func(*extras)
                      )
docs: Allows to apply one function to set of keys cheching if key is in container,
      also trasform ccs key to report lab keys.
  
      extras = Are extra params for func, it will be call like func(*[param1, param2]) 
  
      obj = frag
      keys = [(reportlab, css), ... ]
      container = cssAttr