1. @DomName('EXTDisjointTimerQuery.deleteQueryEXT')
  2. @DocsEditable()
  3. @Experimental()
void deleteQueryExt(TimerQueryExt query)

Source 

@DomName('EXTDisjointTimerQuery.deleteQueryEXT')
@DocsEditable()
@Experimental() // untriaged
void deleteQueryExt(TimerQueryExt query) =>
    _blink.BlinkEXTDisjointTimerQuery.instance
        .deleteQueryEXT_Callback_1_(this, query);