theme_{$post_type}_templates
Filter Hook: Filters list of page templates for a theme.
Source: wp-includes/class-wp-theme.php:1346
WP_Theme::get_page_templates()
Method: Returns the theme’s post templates for a given post type.
Source: wp-includes/class-wp-theme.php:1306
page_template_dropdown()
Function: Prints out option HTML elements for the page templates drop-down.
Source: wp-admin/includes/template.php:915
get_page_templates()
Function: Gets the page templates available in this theme.
Source: wp-admin/includes/theme.php:144