https://developer.android.google.cn/develop/ui/views/components/pickers?hl=es-419
Agrega selectores a tu app | Views | Android Developers
app viewsagregaselectorestuandroid
https://blogespanol.se.com/tag/selectores/
Selectores Archives - Bienvenido al Blog de Schneider Electric
al blogselectoresarchivesbienvenidode
https://developer.mozilla.org/es/docs/Web/CSS/Reference/Selectors/Universal_selectors
Selectores universales - CSS | MDN
El selector universal CSS (*) coincide con elementos de cualquier tipo.
selectoresuniversalescssmdn
https://developers.google.com/google-ads/scripts/docs/elements/selectors?hl=es-419
Selectores | Google Ads Scripts | Google for Developers
google ads scriptsselectoresdevelopers