ยง 6219. Garnishee's statement. Within ten days after service upon a garnishee of an order of attachment, or within such shorter time as the court may direct, the garnishee shall serve upon the sheriff a statement specifying all debts of the garnishee to the defendant, when the debts are due, all property in the possession or custody of the garnishee in which the defendant has an interest, and the amounts and value of the debts and property specified. If the garnishee has money belonging to, or is indebted to, the defendant in at least the amount of the attachment, he may limit his statement to that fact.