In what sense is a repurchase agreement like a bank deposit?

In what sense is a repurchase agreement like a bank deposit?

Gary Gorton, a professor at Yale University, has compared repurchase agreements used by shadow banks to bank deposits in commercial banks. He notes that: “If the depositors become concerned that their deposits are not safe, they can withdraw from the bank by not renewing their repo.”
a. In what sense is a repurchase agreement like a bank deposit?
b. What would be the consequences for a shadow bank if “depositors” failed to renew their repos?