function updateStaticMetricData(model, metrics) {
        const modelMetricData = window.metricData[model];

        Object.assign(
            modelMetricData,
            {
                static: metrics.reduce(
                    (metricDataMap, metricKey) => Object.assign(
                        metricDataMap,
                        {
                            [metricKey]: [
                                ...(modelMetricData.static[metricKey] || []),
                                ...(modelMetricData.active[metricKey] || [])
                            ]
                        }
                    ), {}
                )
            }
        );
    }
Non-redux, mutable state, because need to update extremely quickly