TreeGrid component getCheckedRows method need supports multiple parameter

[fengdie]

// now. get checked and indeterminate nodes

Code:

            let checked = this.$refs.tg.getCheckedRows('checked')
            let indeterminate = this.$refs.tg.getCheckedRows('indeterminate')
            let data = [...checked, ...indeterminate]

hope

Code:

let data =  this.$refs.tg.getCheckedRows(['indeterminate', 'checked'])