clustering/common/src/main/java/org/jboss/as/clustering/controller/Operations.java
public static ModelNode createAddOperation(PathAddress address, int index) {
        return createAddOperation(address, index, Collections.emptyMap());
    }
public static ModelNode createAddOperation(PathAddress address, int index) {
        return createAddOperation(address, index, Collections.emptyMap());
    }
Creates an indexed add operation using the specified address and index
@param address a path address
@param index
@return an add operation