page has a list
<template v-for="(list, index) in lists">
    <el-table>
     <el-table-column
        ...
      width="200">
    </el-table-column>
<!--  -->
<el-table-column
  :render-header="renderLastHeader"
  width="200">
</el-table-column>
    </el-table>
</template>
  methods: {
    renderLastHeader (h, { column, $index }) {
      // 
      return (
        <div>
          <el-button type="text" size="small">
            <i class="el-icon-plus" onClick={this.addColOption}></i>
          </el-button>
          <el-button type="text" size="small">
            <i class="el-icon-plus" onClick={this.addColOptions}></i>
          </el-button>
        </div>
      )
    },
    addColOption () {
        // list 
    },
    addColOptions () {}
element: the function render-header does not allow arguments. How can index in my list get
in this function?