Select the text of a TextEdit object in egui

Question

Is it possible to select all of the text in a TextEdit widget upon a double-click event? I know how to detect the double-click event, I just can't see any way to select all text.

let text_edit = egui::TextEdit::singleline(&mut parameter.str_value)
.desired_width(50.0);
let output = text_edit.show(ui);
if output.response.double_clicked() {
    // What to do here?
}