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<?php
// Do NOT include the opening php tag

add_filter( 'genesis_comment_list_args', 'child_comment_list_args' );
/**
 * Change Avatar size.
 *
 * @author Greg Rickaby
 * @since 1.0.0
 */
function child_comment_list_args( $args ) {
	return array( 'type' => 'comment', 'avatar_size' => 42, 'callback' => 'genesis_comment_callback' );
}