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[Feature] Get the height and width of the rectangle when using series->type:treemap->label:formatter function

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### What problem does this feature solve? import * as echarts from 'echarts' chart = proxy.$echarts.init(document.getElementById('myEcharts'), 2： treemap 3： chart.setOption->label->formatter:params Can't get the height and width of the rectangle when...

### Version 5.4.3 ### Link to Minimal Reproduction https://echarts.apache.org/examples/en/editor.html?c=treemap-show-parent ### Steps to Reproduce 1： import * as echarts from 'echarts' chart = proxy.$echarts.init(document.getElementById('myEcharts'), 2： treemap 3： chart.setOption->label->formatter:params ### Current Behavior...