bp_get_email( string $email_type )

function bp_get_email( $email_type ) {
	$switched = false;

	// Switch to the root blog, where the email posts live.
	if ( ! bp_is_root_blog() ) {
		switch_to_blog( bp_get_root_blog_id() );
		$switched = true;
	}

	$args = array(
		'no_found_rows'    => true,
		'numberposts'      => 1,
		'post_status'      => 'publish',
		'post_type'        => bp_get_email_post_type(),
		'suppress_filters' => false,

		'tax_query'        => array(
			array(
				'field'    => 'slug',
				'taxonomy' => bp_get_email_tax_type(),
				'terms'    => $email_type,
			)
		),
	);

	/**
	 * Filters arguments used to find an email post type object.
	 *
	 * @since BuddyPress 2.5.0
	 *
	 * @param array  $args       Arguments for get_posts() used to fetch a post object.
	 * @param string $email_type Unique identifier for a particular type of email.
	 */
	$args = apply_filters( 'bp_get_email_args', $args, $email_type );
	$post = get_posts( $args );
	if ( ! $post ) {
		if ( $switched ) {
			restore_current_blog();
		}

		return new WP_Error( 'missing_email', __FUNCTION__, array( $email_type, $args ) );
	}

	/**
	 * Filters arguments used to create the BP_Email object.
	 *
	 * @since BuddyPress 2.5.0
	 *
	 * @param WP_Post $post       Post object containing the contents of the email.
	 * @param string  $email_type Unique identifier for a particular type of email.
	 * @param array   $args       Arguments used with get_posts() to fetch a post object.
	 * @param WP_Post $post       All posts retrieved by get_posts( $args ). May only contain $post.
	 */
	$post  = apply_filters( 'bp_get_email_post', $post[0], $email_type, $args, $post );
	$email = new BP_Email( $email_type );


	/*
	 * Set some email properties for convenience.
	 */

	// Post object (sets subject, content, template).
	$email->set_post_object( $post );

	/**
	 * Filters the BP_Email object returned by bp_get_email().
	 *
	 * @since BuddyPress 2.5.0
	 *
	 * @param BP_Email $email      An object representing a single email, ready for mailing.
	 * @param string   $email_type Unique identifier for a particular type of email.
	 * @param array    $args       Arguments used with get_posts() to fetch a post object.
	 * @param WP_Post  $post       All posts retrieved by get_posts( $args ). May only contain $post.
	 */
	$retval = apply_filters( 'bp_get_email', $email, $email_type, $args, $post );

	if ( $switched ) {
		restore_current_blog();
	}

	return $retval;
}