You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: gemma.rs
    path of file: ./repos/candle/candle-transformers/src/models
    
    the code of the file until where you have to start completion: use std::sync::Arc;

use candle::{DType, Device, Module, Result, Tensor, D};
use candle_nn::{linear_b as linear, Linear, VarBuilder};

fn default_max_position_embeddings() -> usize {
    4096
}

#[derive(
    
    fn forward(&self, x: &Tensor) -> Result<Tensor> {
        let x_dtype = x.dtype();
        let internal_dtype = match x_dtype {
            DType::F16 | DType::BF16 => DType::F32,
            d => d,
        };
        let hidden_size = x.dim(D::Minus1)?;
        let x = x.to_dtype(internal_dtype)?;
        let norm_x = (x.sqr()?.sum_keepdim(D::Minus1)? / hidden_size as f64)?;
        let x_normed = x.broadcast_div(&(norm_x + self.eps)?.sqrt()?)?;
        x_normed
            .to_dtype(x_dtype)?
            .broadcast_mul(&(&self.weight + 1.0)?)
    }