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: jtree_unrolled_dbn_inf_engine.m
    path of file: ./repos/bnt/BNT/inference/dynamic/@jtree_unrolled_dbn_inf_engine
    
    the code of the file until where you have to start completion: function engine = jtree_unrolled_dbn_inf_engine(bnet, T, varargin)

    
function engine = jtree_unrolled_dbn_inf_engine(bnet, T, varargin)
% JTREE_UNROLLED_DBN_INF_ENGINE Unroll the DBN for T time-slices and apply jtree to the resulting static net
% engine = jtree_unrolled_dbn_inf_engine(bnet, T, ...)
%
% The following optional arguments can be specified in the form of name/value pairs:
% [default value in brackets]
%
% useC      - 1 means use jtree_C_inf_engine instead of jtree_inf_engine [0]
% constrained - 1 means we constrain ourselves to eliminate slice t before t+1 [1]
%
% e.g., engine = jtree_unrolled_inf_engine(bnet, 'useC', 1);

% set default params
N = length(bnet.intra);
useC = 0;
constrained = 1;

if nargin >= 3
  args = varargin;
  nargs = length(args);
  if isstr(args{1})
    for i=1:2:nargs
      switch args{i},
       case 'useC',   useC = args{i+1};
       case 'constrained',  constrained = args{i+1};
       otherwise,  
	error(['invalid argument name ' args{i}]);       
      end