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: ft_multiplotER.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8/external/fieldtrip
    
    the code of the file until where you have to start completion: function [cfg] = ft_multiplotER(cfg, varargin)

% FT_MULTIPLOTER plots the event-related fields or potentials versus time
% or of oscillatory activity (power or coherence) versus frequency. Multiple
% datasets can be overlayed.  The plots are arranged according to their
% location specified in the layout.
%
% Use as
%   ft_multiplotER(cfg, data)

    
function [cfg] = ft_multiplotER(cfg, varargin)

% FT_MULTIPLOTER plots the event-related fields or potentials versus time
% or of oscillatory activity (power or coherence) versus frequency. Multiple
% datasets can be overlayed.  The plots are arranged according to their
% location specified in the layout.
%
% Use as
%   ft_multiplotER(cfg, data)
% or
%   ft_multiplotER(cfg, data, data2, ..., dataN)
%
% The data can be an ERP/ERF produced by FT_TIMELOCKANALYSIS, a powerspectrum
% produced by FT_FREQANALYSIS or a coherencespectrum produced by FT_FREQDESCRIPTIVES.
% If you specify multiple datasets they must contain the same channels, etc.
%
% The configuration can have the following parameters:
%   cfg.parameter     = field to be plotted on y-axis (default depend