using System.Data.Entity.Core.Query.InternalTrees; Node node = new Node( OpType.ScanTable, null, null, new Table("Products", "dbo"), null );This code creates a new Node object representing a table scan operation on the "Products" table in the "dbo" schema. The OpType property is set to ScanTable, which is an enumeration value that indicates the type of operation being performed. Overall, the System.Data.Entity.Core.Query.InternalTrees namespace is part of the Entity Framework package library, which is used for working with relational data in .NET applications. It provides a powerful set of tools for querying, inserting, updating, and deleting data in a database, using a variety of data access strategies.