WordPress at a glance
filter is not described

stylesheet filter-hook . WP 1.5.0

Filters the name of current stylesheet.

Usage

add_filter( 'stylesheet', 'filter_function_name_8892' );
function filter_function_name_8892( $stylesheet ){
	// filter...

	return $stylesheet;
}
$stylesheet(string)
Name of the current stylesheet.

Where the hook is called

get_stylesheet()
wp-includes/theme.php 160
return apply_filters( 'stylesheet', get_option( 'stylesheet' ) );

Where the hook is used (in WP core)

wp-includes/class-wp-customize-manager.php 675
add_filter( 'stylesheet', array( $this, 'get_stylesheet' ) );
wp-includes/class-wp-customize-manager.php 713
remove_filter( 'stylesheet', array( $this, 'get_stylesheet' ) );