Add example using dynamic CGF and parameters together

Author: Bensuo

sycl/doc/syclgraph/SYCLGraphUsageGuide.md

@@ -497,6 +497,67 @@ ExecGraph.update(DynamicCGNode);
 Queue.ext_oneapi_graph(ExecGraph).wait();
 ```
 
+### Dynamic Command Groups With Dynamic Parameters
+
+Example showing how a graph with a dynamic command group that uses dynamic
+parameters in a node can be updated.
+
+```cpp
+size_t n = 1024;
+queue Queue{};
+exp_ext::command_graph Graph{Queue.get_context(), Queue.get_device()};
+
+int *PtrA = malloc_device<int>(n, Queue);
+int *PtrB = malloc_device<int>(n, Queue)​;
+
+// Kernels loaded from kernel bundle
+const std::vector<kernel_id> builtinKernelIds =
+      myDevice.get_info<info::device::built_in_kernel_ids>();
+kernel_bundle<bundle_state::executable> myBundle =
+      get_kernel_bundle(myContext, { myDevice }, builtinKernelIds);
+
+kernel builtinKernelA = myBundle.get_kernel(builtinKernelIds[0]);
+kernel builtinKernelB = myBundle.get_kernel(builtinKernelIds[1]);
+
+// Create a dynamic parameter with an initial value of PtrA
+exp_ext::dynamic_parameter DynamicPointerArg{Graph, PtrA};
+
+// Create command groups for both kernels which use DynamicPointerArg
+auto CgfA = [&](handler &cgh) {
+  cgh.set_arg(0, DynamicPointerArg);
+  cgh.parallel_for(range {n}, builtinKernelA);
+};
+
+auto CgfB = [&](handler &cgh) {
+  cgh.set_arg(0, DynamicPointerArg);
+  cgh.parallel_for(range {n / 2}, builtinKernelB);
+};
+
+// Construct a dynamic command-group with CgfA as the active cgf (index 0).
+auto DynamicCG = exp_ext::dynamic_command_group(Graph, {CgfA, CgfB});
+
+// Create a dynamic command-group graph node.
+auto DynamicCGNode = Graph.add(DynamicCG);
+
+auto ExecGraph = Graph.finalize(exp_ext::property::graph::updatable{});
+
+// The graph will execute CgfA with PtrA.
+Queue.ext_oneapi_graph(ExecGraph).wait();
+
+//Update DynamicPointerArg with a new value
+DynamicPointerArg.update(PtrB);
+
+// Sets CgfB as active in the dynamic command-group (index 1).
+DynamicCG.set_active_cgf(1);
+
+// Calls update to update the executable graph node with the changes to
+// DynamicCG and DynamicPointerArg.
+ExecGraph.update(DynamicCGNode);
+
+// The graph will execute CgfB with PtrB.
+Queue.ext_oneapi_graph(ExecGraph).wait();
+```
+
 ### Whole Graph Update
 
 Example that shows recording and updating several nodes with different