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: estimate.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8/marsbar-0.44/@mardo_5
    
    the code of the file until where you have to start completion: function [marsD] = estimate(marsD, marsY,
    
function params = sf_call_compat(params)
% Replicates old calling behaviour, for backwards compatibility
  
% Replicate result of passing empty cell array, but warn that this
% will be removed soon  
if ischar(params) | iscell(params)
  warning(['Cell / char form of params deprecated, ' ...
	   'please use struct form instead']);
end