# File lib/new_relic/metric_data.rb, line 39
    def to_json(*a)
       %Q[{"metric_spec":#{metric_spec.to_json},"stats":{"total_exclusive_time":#{stats.total_exclusive_time},"min_call_time":#{stats.min_call_time},"call_count":#{stats.call_count},"sum_of_squares":#{stats.sum_of_squares},"total_call_time":#{stats.total_call_time},"max_call_time":#{stats.max_call_time}}}]
    end