WordPress at a glance
filter is not described

wpsupercache_buffer filter-hook . WPSCache 1.0

Usage

add_filter( 'wpsupercache_buffer', 'filter_function_name_8065' );
function filter_function_name_8065( $buffer ){
	// filter...

	return $buffer;
}
$buffer
-

Where the hook is called

wp_cache_get_ob()
wpsupercache_buffer
wp-super-cache/wp-cache-phase2.php 2143
$buffer = apply_filters( 'wpsupercache_buffer', $buffer );

Where in WP core the hook is used WP Super Cache

wp-super-cache/plugins/awaitingmoderation.php 11
add_filter( 'wpsupercache_buffer', 'awaitingmoderation_action' );