feat: add helper function to modify node builder (#11682)

crates/node/builder/src/builder/mod.rs

@@ -162,6 +162,14 @@ impl<ChainSpec> NodeBuilder<(), ChainSpec> {
     pub const fn new(config: NodeConfig<ChainSpec>) -> Self {
         Self { config, database: () }
     }
+
+    /// Apply a function to the builder
+    pub fn apply<F>(self, f: F) -> Self
+    where
+        F: FnOnce(Self) -> Self,
+    {
+        f(self)
+    }
 }
 
 impl<DB, ChainSpec> NodeBuilder<DB, ChainSpec> {
@@ -400,6 +408,14 @@ where
         &self.builder.config
     }
 
+    /// Apply a function to the builder
+    pub fn apply<F>(self, f: F) -> Self
+    where
+        F: FnOnce(Self) -> Self,
+    {
+        f(self)
+    }
+
     /// Sets the hook that is run once the node's components are initialized.
     pub fn on_component_initialized<F>(self, hook: F) -> Self
     where