如何用amis的echart画地图热力图

amis可以很好的兼容echart，但是要画地图热力图之类的需求从echart的方法来看，需要导入地图的.js文件等无法用纯json格式的语句描述的操作，所以我想知道amis的echart能否画地图热力图呢？

Start by reviewing amis's ECharts integration and how its JSON configuration handles external map assets. Determine whether a map heatmap can be expressed through the supported configuration, and document the required approach or limitation. The issue names no files or tests, so completion would be a verified answer with a reproducible configuration if supported.

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