num value

Source 

@DomName('SimpleLength.value')
@DocsEditable()
@Experimental() // untriaged
num get value => _blink.BlinkSimpleLength.instance.value_Getter_(this);
void value=(num value)

Source 

@DomName('SimpleLength.value')
@DocsEditable()
@Experimental() // untriaged
set value(num value) =>
    _blink.BlinkSimpleLength.instance.value_Setter_(this, value);