bool checked

Source 

@DomName('HTMLInputElement.checked')
@DocsEditable()
bool get checked =>
    _blink.BlinkHTMLInputElement.instance.checked_Getter_(this);
void checked=(bool value)

Source 

@DomName('HTMLInputElement.checked')
@DocsEditable()
set checked(bool value) =>
    _blink.BlinkHTMLInputElement.instance.checked_Setter_(this, value);