MultiLevelLabelFormatterCallback typedef Null safety

MultiLevelLabelFormatterCallback = ChartAxisLabel Function(MultiLevelLabelRenderDetails multiLevelLabelRenderArgs)

Signature for the multiLevelLabelFormatter callback that returns ChartAxisLabel.

Implementation

typedef MultiLevelLabelFormatterCallback = ChartAxisLabel Function(
    MultiLevelLabelRenderDetails multiLevelLabelRenderArgs);