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: osp_editSubSpecAlignLNorm.m
    path of file: ./repos/osprey/process
    
    the code of the file until where you have to start completion: function [varargout] = osp_editSubSpecAlignLNorm(varargin)
%% [varargout] = osp_editSubSpecAlign(varargin)
%   Aligns sub-spectra of edited MRS data to minimize
%   subtraction artefacts. It uses a L1 Norm minimization including the
%   whole frequency range (Cleve et al., JMR, 2017 (https://doi.org/10.1016/j.jmr.2017.04.004) .
%
%   USAGE:
%       [outA, outB] = osp_editSubSpecAlign(inA, inB/target);
%
%   INPUTS:
%       inA        = Input data structure A.
%       inB        = Input data structure B. (optional)
%
%   OUTPUTS:
%       outA       = Output following alignment of averages.
%       outB       = Output following alignment of averages. (optional)
%
%   AUTHOR:

    
function [varargout] = osp_editSubSpecAlignLNorm(varargin)
%% [varargout] = osp_editSubSpecAlign(varargin)
%   Aligns sub-spectra of edited MRS data to minimize
%   subtraction artefacts. It uses a L1 Norm minimization including the
%   whole frequency range (Cleve et al., JMR, 2017 (https://doi.org/10.1016/j.jmr.2017.04.004) .
%
%   USAGE:
%       [outA, outB] = osp_editSubSpecAlign(inA, inB/target);
%
%   INPUTS:
%       inA        = Input data structure A.
%       inB        = Input data structure B. (optional)
%
%   OUTPUTS:
%       outA       = Output following alignment of averages.
%       outB       = Output following alignment of averages. (optional)
%
%   AUTHOR:
%       Dr. Helge Zollner (Johns Hopkins University, 2021-03-01)
%       hzoelln2@jhmi.edu
%   
%   CREDITS:    
%       This code is based on numerous functions from the FID-A toolbox by
%       Dr. Jamie Near (McGill University)
%       https://github.com/CIC-methods/FID-A
%       Simpson et al., Magn Reson Med 77:23-33 (2017)
%
%   HISTORY:
%       2021-01-01: First version of the code.

% Determine whether there are 2 (MEGA) or 4 (HERMES/HERCULES) inputs
if nargin == 2 && isstruct(varargin{2})
    seqType = 'MEGA';
    inA     = varargin{1};
    inB     = varargin{2};
    if inA.subspecs > 1 || inB.subspecs > 1
        error('Error in osp_editSubSpecAlign! Both data structs must have only 1 sub-spectrum');
    end