i want to know ViewExpression how to use

[A-little-bit-of-data]

I would like to know about the following changes to the ViewExpression class in version 429. How to obtain the path here and set it in new ViewExpression().
private ViewExpression(Optional identity, Optional catalog, Optional schema, String expression, List path)
{
this.identity = requireNonNull(identity, "identity is null");
this.catalog = requireNonNull(catalog, "catalog is null");
this.schema = requireNonNull(schema, "schema is null");
this.expression = requireNonNull(expression, "expression is null");
this.path = List.copyOf(path);

    if (catalog.isEmpty() && schema.isPresent()) {
        throw new IllegalArgumentException("catalog must be present if schema is present");
    }
}