question: public static MultisigAggregateModificationTransaction createMultisigModification ( ) { return new MultisigAggregateModificationTransaction ( TimeInstant . ZERO , Utils . generateRandomAccount ( ) , Collections . singletonList ( new MultisigCosignatoryModification ( MultisigModificationType . AddCosignatory , Utils . generateRandomAccount ( ) ) ) ) ; }
target:  Creates a multisig aggregate modification.