docs: public void focus(String expression, UIComponent base) {
          if (LangUtils.isValueBlank(expression)) {
              return;
          }
  
          FacesContext facesContext = getFacesContext();
  
          String clientId = SearchExpressionFacade.resolveClientId(facesContext,
                  base,
                  expression);
          executeScript("PrimeFaces.focus('" + clientId + "');");
      }