int cols

Source 

@DomName('HTMLTextAreaElement.cols')
@DocsEditable()
int get cols => _blink.BlinkHTMLTextAreaElement.instance.cols_Getter_(this);
void cols=(int value)

Source 

@DomName('HTMLTextAreaElement.cols')
@DocsEditable()
set cols(int value) =>
    _blink.BlinkHTMLTextAreaElement.instance.cols_Setter_(this, value);