GetItemOutcome outcome = table.getItemOutcome(new GetItemSpec()
.withPrimaryKey(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK)
.withConsistentRead(true));
Item item = outcome.getItem();
System.out.println(item);
table.updateItem(HASH_KEY, FIRST_CUSTOMER_ID, RANGE_KEY, ADDRESS_TYPE_WORK,
// update expression (list_append: concatenate two lists.)
"set phone = list_append(:a, :b)",
// condition expression
"zipcode = :zipcode",
null,