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: snr_fwd_bias_fit.m
    path of file: ./repos/mpsim/lib/snr/bias
    
    the code of the file until where you have to start completion: function varargout = snr_fwd_bias_fit (snr_meas_db, setup, varargin)
%SNR_FWD_BIAS_FIT: Fits empirical biases for SNR measurements to match simulation.
% 
% SYNTAX:
%    setup = snr_fwd_bias_fit (snr_meas_db, setup);

    
function varargout = snr_fwd_bias_fit (snr_meas_db, setup, varargin)
%SNR_FWD_BIAS_FIT: Fits empirical biases for SNR measurements to match simulation.
% 
% SYNTAX:
%    setup = snr_fwd_bias_fit (snr_meas_db, setup);
%
% INPUT: none    
%    snr_meas_db: [vector] SNR measurements (in decibels)
%    setup: [structure] output of function snr_setup
%
% OUTPUT:
%    setup: [structure] setup with updated field "bias"
%    snr_simul_db_post: [vector] bias-corrected SNR simulation (in decibels)
%    snr_simul_trend