A suit brought by a creditor in chancery against an executor oradministrator, being really a suit by the executor or administrator, in the name of acreditor, against himself, in order to compel the creditors to take au equal distributionof the assets. 2 Williams, Ex’rs, 1915.Also any suit instituted by agreement between the parties to obtain the opinion ofthe court upon some doubtful question in which they are interested.