🤔请问如何给一个多折线趋势图的每一种颜色添加一个渐变色？

请问如何给一个多折线趋势图的每一种颜色添加一个渐变色？

目前官方文档给的只有针对一种颜色的，比如单折线图，像多折线图的话通过color应该设置不了，但是通过下面这种又无法设置多种颜色，现在有办法将多种颜色与颜色渐变结合吗？
area: {
style: {
fillOpacity: 0.15,
fill: 'l(270) 0:#ffffff 1:#1890ff',
},
},

The issue names a multi-line chart and the area.style.fillOpacity and fill settings, but no repository file or test entry point. Start by locating the multi-line chart and area-style documentation or examples, then check whether per-series gradient colors are supported. Done means confirming a workable configuration or defining the needed behavior clearly.

Written by the indexing model from the issue text.