eventespresso / event-espresso-core

		$fn = (array) $field_name;

		$args = array_merge( $fn, (array) $args );

		if ( !method_exists( $this, $callback ) )

			throw new EE_Error(sprintf( __('The method named "%s" given as the callback param in "display_in_my_timezone" does not exist.  Please check your spelling', 'event_espresso'), $callback ) );

		$args = (array) $args;

		$return =  $prepend . call_user_func_array( array( $this, $callback ), $args ) . $append;

		//process addressees for each context.  Child classes will have to have methods for each context defined to handle the processing of the data object within them

		foreach ( $this->_contexts as $context => $details ) {

			$xpctd_method = '_' . $context . '_addressees';

			if ( !method_exists( $this, $xpctd_method ) )

				throw new EE_Error( sprintf( __('The data for %1$s message type cannot be prepared because there is no set method for doing so.  The expected method name is "%2$s" please doublecheck the %1$s message type class and make sure that method is present', 'event_espresso'), $this->label['singular'], $xpctd_method) );

			 $this->_addressees[$context] = call_user_func( array( $this, $xpctd_method ) );

		}

		return true; //data was processed successfully.

		}

		/** @type WPDB $wpdb */

		global $wpdb;

		if( ! method_exists( $wpdb, $wpdb_method ) ){

			throw new EE_Error( sprintf( __( 'There is no method named "%s" on Wordpress\' $wpdb object','event_espresso' ), $wpdb_method ) );

		}

		if( WP_DEBUG ){

			$old_show_errors_value = $wpdb->show_errors;

			$wpdb->show_errors( FALSE );