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: StationaryDist_PType.m
    path of file: ./repos/VFIToolkit-matlab/StationaryDist/PType
    
    the code of the file until where you have to start completion: function StationaryDist=StationaryDist_PType(jequaloneDist,AgeWeightParamNames,Policy,n_d,n_a,n_z,N_j,Names_i,d_grid, a_grid, z_grid,pi_z,Phi_aprime,Case2_Type,Parameters,PhiaprimeParamNames,PTypeDistNames,simoptions)
% Allows for different permanent (fixed) types of agent. 
% See ValueFnIter_PType for general idea.
%
% Rest of this description describes how those inputs not used for
% ValueFnIter_PType should be set up.
%
% jequaloneDist can either be same for all permanent types, or must be passed as a structure.
% AgeWeightParamNames is either same for all permanent types, or must be passed as a structure.
%
%
%
% How exactly to handle th
    
function does not, you could set it up so that this is handled by the same function but a parameter whose value differs by permanent type
                    pi_z_temp=pi_z;
                end
            end
        elseif isa(pi_z,'struct')
            pi_z_temp=pi_z.(Names_i{ii}); % Different grids by permanent type, but not depending on age.
        end
    elseif isa(pi_z,'struct')
        pi_z_temp=pi_z.(Names_i{ii}); % Different grids by permanent type, but not depending on age. (same as the case just above; this case can occour with or without the existence of simoptions, as long as there is no simoptions.agedependentgrids)
    end
    
    if finitehorz==1 % Only needed for simulation in this case
        
        % Parameters are allowed to be given as structure, or as vector/matrix
        % (in terms of their dependence on permanent type). So go through each of
        % these in term.
        % ie. Parameters.alpha=[0;1]; or Parameters.alpha.ptype1=0; Parameters.alpha.ptype2=1;
        Parameters_temp=Parameters;
        FullParamNames=fieldnames(Parameters); % all the different parameters
        nFields=length(FullParamNames);
        for kField=1:nFields
            if isa(Parameters.(FullParamNames{kField}), 'struct') % Check the current parameter for permanent type in structure form
                % Check if this parameter is used for the current permanent type (it may or may not be, some parameters are only used be a subset of permanent types)
                if isfield(Parameters.(FullParamNames{kField}),Names_i{ii})
                    Parameters_temp.(FullParamNames{kField})=Parameters.(FullParamNames{kField}).(Names_i{ii});
                end