code: function() {
          var me = this,
              owner = me.owner,
              strategies = me.errorStrategies,
              msgTarget = owner.msgTarget;
          return !owner.preventMark && Ext.isString(msgTarget) ?
                  (strategies[msgTarget] || strategies.elementId) :
                  strategies.none;
      }
docs: Return the set of strategy functions from the {@link #errorStrategies errorStrategies collection}
  that is appropriate for the field's {@link Ext.form.Labelable#msgTarget msgTarget} config.