parameters: (self, element, argname=None, **kw)
docstring: coerce the given value to :class:`._truncated_label`.
  
          Existing :class:`._truncated_label` and
          :class:`._anonymous_label` objects are passed
          unchanged.
docstring_summary: coerce the given value to :class:`._truncated_label`.
docstring_tokens: coerce the given value to : class : . _truncated_label .
function: def _literal_coercion(self, element, argname=None, **kw):
          """coerce the given value to :class:`._truncated_label`.
  
          Existing :class:`._truncated_label` and
          :class:`._anonymous_label` objects are passed
          unchanged.
          """
  
          if isinstance(element, elements._truncated_label):
              return element
          else:
              return elements._truncated_label(element)
function_tokens: def _literal_coercion ( self , element , argname = None , * * kw ) : if isinstance ( element , elements . _truncated_label ) : return element else : return elements . _truncated_label ( element )