limites de deslocamento(The minimum and maximum scroll positions that a user can pan or scroll between. Scroll boundaries allow virtualized controls to "reserve" additional space at the beginning or end of the panning region to place new content)
limites de rolagem(The minimum and maximum scroll positions that a user can pan or scroll between. Scroll boundaries allow virtualized controls to "reserve" additional space at the beginning or end of the panning region to place new content)
