[Flutter] Customize PieChartSectionData title with different styles

I have a pie chart visualisation, and I want to customize its sections. Specifically, I want fund.name to be in FontWeight.bold, and fund.amount.toStringAsFixed(2) to be in green. But I do not know how to dot it, because title must be a String.

I tried for example to convert rich text to String, but it did not work.

I am using fl_charts: ^0.68.0

List<PieChartSectionData> _getSections(List<fund> allFunds) {
return allFunds.map((fund) {
return PieChartSectionData(
color: fund.color,
value: fund.amount,
title: '${fund.name}\n ${fund.amount.toStringAsFixed(2)} €',
titlePositionPercentageOffset: 2,
badgeWidget: SvgPicture.asset(
fund.svg,
height: 26,
color: fund.color,
),
badgePositionPercentageOffset: 0.5
);
}).toList();
}

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