Function getIncrementalId

src/util/model.ts:1378–1387

(
    seriesModel: SeriesModel,
    useIncremental?: boolean
)

}

export function getIncrementalId(
    seriesModel: SeriesModel,
    useIncremental?: boolean
): Displayable['incremental'] {
    // 0 means disable incremental.
    // 1 is preserved for backward compatibility.
    return retrieve2(useIncremental, true)
        ? seriesModel.seriesIndex + 2
        : 0;
}

export function preparePipelineContext(
    seriesModel: SeriesModel<SeriesOption & SeriesLargeOptionMixin>,