ChartMeta interface missing properties

[gregoroque]

Expected Behavior

• ChartMeta should contain all properties that getChartMeta return

Current Behavior

getDatasetMeta(datasetIndex: number): ChartMeta;

• function getDatasetMeta retruns more properties than exist in interface ChartMeta e.g. 'Total'.

Possible Solution

expand ChartMeta definition to include all possible properties

Steps to Reproduce

Context

Environment

• Chart.js version: 3.4.1
• Browser name and version: doesn't matter
• Link to your project: not shared

[kurkle]

total is only present for doughnut/pie charts

[gregoroque]

@kurkle thanks, forgot to mention that

[etimberg]

This one might be quite complex to type since it's per dataset. I assume we'd need something similar to ChartDataset with a DeepPartial across the meta type per dataset