1. @DomName('URLSearchParams.set')
  2. @DocsEditable()
  3. @Experimental()
void set(String name, String value)

Source 

@DomName('URLSearchParams.set')
@DocsEditable()
@Experimental() // untriaged
void set(String name, String value) =>
    _blink.BlinkURLSearchParams.instance.set_Callback_2_(this, name, value);