date_combo_element_process in core/modules/date/
Process an individual date element.
date_combo_validate in core/modules/date/
Validate and update a combo element.
file_field_widget_process in core/modules/file/
Render API callback: Processes a file_generic field element.
image_field_widget_process in core/modules/image/
An element #process callback for the image_image field type.
link_field_process in core/modules/link/link.module
Processes the link type element before displaying the field.
taxonomy_autocomplete_validate in core/modules/taxonomy/taxonomy.module
Form element validate handler for taxonomy term autocomplete element.