liquibase-core/src/main/java/liquibase/parser/core/ParsedNode.java
public List<ParsedNode> getChildren(String namespace, String nodename) {
        List<ParsedNode> returnList = new ArrayList<>();
        for (ParsedNode node : children) {
            if (nodeMatches(node, namespace, nodename)) {
                returnList.add(node);
            }
        }
        return Collections.unmodifiableList(returnList);
    }
public List<ParsedNode> getChildren(String namespace, String nodename) {
        List<ParsedNode> returnList = new ArrayList<>();
        for (ParsedNode node : children) {
            if (nodeMatches(node, namespace, nodename)) {
                returnList.add(node);
            }
        }
        return Collections.unmodifiableList(returnList);
    }
Returns all child nodes with the given namespace and name.
If none match, an empty list is returned.
Returned list is unmodifiableList.