Support start-index in Params$Resource$Data$Realtime$Get

calling google.analytics('v3').data.realtime.get
=> https://www.googleapis.com/analytics/v3/data/realtime?
not yet support start-index , can add back ?

result.config.params {
ids: 'ga:<viewId>',
metrics: 'rt:pageviews',
dimensions: 'rt:pagePath',
filters: 'rt:pagePath=@/product/',
'max-results': 5,
sort: '-rt:pageviews',

> **'start-index': 16,**

prettyPrint: false
}
result.data.query {
ids: 'ga:<viewId>',
dimensions: 'rt:pagePath',
metrics: [ 'rt:pageviews' ],
sort: [ '-rt:pageviews' ],
filters: 'rt:pagePath=@/product/',
'max-results': 5
}