public ReturnParameters register(int index, int oracleType) {
            returnParams.add(new ReturnParam(index, oracleType));
            return this;
        }
Registers a return parameter on the Oracle prepared statement.

@param index      0-based index of the return parameter
@param oracleType one of the values from {@link oracle.jdbc.OracleTypes}
@return The same instance, for method chaining
oracle12/src/main/java/org/jdbi/v3/oracle12/OracleReturning.java