BP_Email::get( string $property_name, string $transform = 'raw' )

	public function get( $property_name, $transform = 'raw' ) {

		// "content" is replaced by HTML or plain text depending on $content_type.
		if ( $property_name === 'content' ) {
			$property_name = 'content_' . $this->get_content_type();

			if ( ! in_array( $property_name, array( 'content_html', 'content_plaintext', ), true ) ) {
				$property_name = 'content_html';
			}
		}

		if ( ! property_exists( $this, $property_name ) ) {
			return null;
		}


		/**
		 * Filters the value of the specified email property before transformation.
		 *
		 * This is a dynamic filter dependent on the specified key.
		 *
		 * @since BuddyPress 2.5.0
		 *
		 * @param mixed $property_value Property value.
		 * @param string $property_name
		 * @param string $transform How to transform the return value.
		 *                          Accepts 'raw' (default) or 'replace-tokens'.
		 * @param BP_Email $this Current instance of the email type class.
		 */
		$retval = apply_filters( "bp_email_get_{$property_name}", $this->$property_name, $property_name, $transform, $this );

		switch ( $transform ) {
			// Special-case to fill the $template with the email $content.
			case 'add-content':
				$retval = str_replace( '{{{content}}}', wpautop( $this->get_content( 'replace-tokens' ) ), $retval );
				// Fall through.

			case 'replace-tokens':
				$retval = bp_core_replace_tokens_in_text( $retval, $this->get_tokens( 'raw' ) );
				// Fall through.

			case 'raw':
			default:
				// Do nothing.
		}

		/**
		 * Filters the value of the specified email $property after transformation.
		 *
		 * @since BuddyPress 2.5.0
		 *
		 * @param string $retval Property value.
		 * @param string $property_name
		 * @param string $transform How to transform the return value.
		 *                          Accepts 'raw' (default) or 'replace-tokens'.
		 * @param BP_Email $this Current instance of the email type class.
		 */
		return apply_filters( 'bp_email_get_property', $retval, $property_name, $transform, $this );
	}