Generates a CSS selector for heatmap cell elements.
Heatmap cells carry the highcharts-point class. They are typically rendered
as <rect>, but matching by class only is more robust to future Highcharts
changes (e.g., rounded-corner cells using <path>).
Generates a CSS selector for heatmap cell elements.
Heatmap cells carry the
highcharts-pointclass. They are typically rendered as<rect>, but matching by class only is more robust to future Highcharts changes (e.g., rounded-corner cells using<path>).