code: def render(self, ctx=None):
          '''
          Only render if condition applies
  
          :param ctx: rendering context in which the method was called
          :rtype: `Bits`
          :return: rendered value of the container
          '''
          if ctx is None:
              ctx = RenderContext()
          self._initialize()
          if self in ctx:
              self._current_rendered = self._in_render_value()
          else:
              ctx.push(self)
              if self._evaluate_condition(ctx):
                  super(Conditional, self).render(ctx)
              else:
                  self.set_current_value(empty_bits)
              ctx.pop()
          return self._current_renderef render(self, ctx=None):
          '''
          Only render if condition applies
  
          :param ctx: rendering context in which the method was called
          :rtype: `Bits`
          :return: rendered value of the container
          '''
          if ctx is None:
              ctx = RenderContext()
          self._initialize()
          if self in ctx:
              self._current_rendered = self._in_render_value()
          else:
              ctx.push(self)
              if self._evaluate_condition(ctx):
                  super(Conditional, self).render(ctx)
              else:
                  self.set_current_value(empty_bits)
              ctx.pop()
          return self._current_rendered
docs: Only render if condition applies
  
          :param ctx: rendering context in which the method was called
          :rtype: `Bits`
          :return: rendered value of the container