Getting a node in rust didnt work

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:bust_in_silhouette: Asked By Craft Game

so i tried to set a text in a label node from another node in rust but for some reason its says

error[E0599]: no method named `set_text` found for enum `Option<TRef<'_, gdnative::prelude::Label>>` in the current scope
  --> src/lib.rs:24:73
   |
24 |             owner.get_node("Node/Label2").unwrap().assume_safe().cast::<Label>().set_text("_process (rust)\ndelta = {}")
   |                                                                                  ^^^^^^^^ method not found in `Option<TRef<'_, gdnative::prelude::Label>>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0599`.
error: could not compile `godot`

To learn more, run the command again with --verbose.

here is my code

use gdnative::prelude::*;

#[derive(NativeClass)]
#[inherit(Spatial)]
pub struct HelloWorld;

#[methods]
impl HelloWorld {
//	let test:str = "rust"
	    
	fn new(_owner: &Spatial) -> Self {
		HelloWorld
	}

	#[export]
	fn _ready(&self, _owner: &Spatial) {
		godot_print!("_ready (rust)");
	}
	#[export]
	fn _process(&self, owner: &Spatial, delta: f64){
		godot_print!("_process (rust)\ndelta = {}", delta);
//		owner.get_node("Node/Label2").unwrap().cast::<Ref<Label>>().set_text("_process (rust)\ndelta = {}")
		unsafe {
			owner.get_node("Node/Label2").unwrap().assume_safe().cast::<Label>().set_text("_process (rust)\ndelta = {}")
		}
	}
}

fn init(handle: InitHandle) {
	handle.add_tool_class::<HelloWorld>();
}

godot_init!(init);