def dump(output)
      output.name(self)
      output.attribute(:input, input)
      output.nest(:context, context)
    end
def dump(output)
      output.name(self)
      output.attribute(:input, input)
      output.nest(:context, context)
    end
Dump state to output

 @param [Formatter] formatter

 @return [undefined]

 @api private