add link to PlanContext

Author: adriangb

datafusion/expr/src/logical_plan/tree_node.rs

@@ -882,6 +882,13 @@ impl LogicalPlan {
 /// to perform mutable operations via [`Self::update_plan_from_children`].
 /// After mutating the `LogicalPlanContext.children`, or after creating the `LogicalPlanContext`,
 /// call `update_plan_from_children` to sync.
+/// 
+/// See also:
+/// - [`datafusion_common::tree_node::TreeNode`] trait for tree traversal and mutation utilities.
+/// - [`datafusion_common::tree_node::ConcreteTreeNode`] trait for integrating with the tree node utilities.
+/// - [`datafusion::physical_plan::tree_node::PlanContext`] for a similar context for physical plans.
+/// 
+/// [`datafusion::physical_plan::tree_node::PlanContext`]: https://docs.rs/datafusion/latest/datafusion/physical_plan/tree_node/struct.PlanContext.html
 #[derive(Debug, Clone)]
 pub struct LogicalPlanContext<T: Sized> {
     /// The logical plan associated with this context.