Delete Compare Exchange Operation

// Get an existing compare-exchange item
const getCmpXchgOp = new GetCompareExchangeValueOperation("johnDoe@gmail.com");
const itemResult = await documentStore.operations.send(getCmpXchgOp);

// Keep the item's version
const versionOfItem = itemResult.index; 

// Delete the compare-exchange item:
// =================================

// Define the delete compare-exchange operation, pass:
// * The item's KEY
// * The item's INDEX (its version)
//   The compare-exchange item will only be deleted if this number 
//   is equal to the one stored on the server when the delete operation is executed.
const deleteCmpXchgOp = new DeleteCompareExchangeValueOperation("johnDoe@gmail.com", versionOfItem);

// Execute the operation by passing it to operations.send
const deleteResult = await documentStore.operations.send(deleteCmpXchgOp);

// Verify delete results:
assert.ok(deleteResult.successful);

const deleteCmpXchgOp = new DeleteCompareExchangeValueOperation(key, index, clazz?);

// Return value of store.operations.send(deleteCmpXchgOp)
// ======================================================
class CompareExchangeResult {
    successful;
    value;
    index;
}