code: function MailingList( category, wpcom ) {
  	if ( ! ( this instanceof MailingList ) ) {
  		return new MailingList( category, wpcom );
  	}
  
  	this._category = category;
  	this.wpcom = wpcom;
  }
docs: `MailingList` constructor.
  
  @constructor
  @param {WPCOM} wpcom
  @public