get or change sketch symbol value

symbol value

let sketch = require('sketch')
let doc = sketch.getSelectedDocument()
let selectedLayersObject = doc.selectedLayers
let selectedLayersArray = selectedLayersObject.layers

selectedLayersArray.forEach(layer => {
       console.log(layer.overrides[0].value = 'aaaaaaaaabbb')
//     layer.layers.forEach(layer => {
//         //console.log(layer)
//         if(layer.type == "Text") {
//             console.log('aaa')
//             layer.selected = true;
//         }
//         
//     })
});