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: m_30_mopex2_7p_5s.m
    path of file: ./repos/MARRMoT/MARRMoT/Models/Model files
    
    the code of the file until where you have to start completion: classdef m_30_mopex2_7p_5s < MARRMoT_model
% Class for hydrologic c
    
function [dS, fluxes] = model_fun(obj, S)
            % parameters
            theta   = obj.theta;
            tcrit = theta(1);     % Snowfall & snowmelt temperature [oC]
            ddf   = theta(2);     % Degree-day factor for snowmelt [mm/oC/d]
            s2max = theta(3);     % Maximum soil moisture storage [mm]
            tw    = theta(4);     % Groundwater leakage time [d-1]
            tu    = theta(5);     % Slow flow routing response time [d-1]
            se    = theta(6);     % Root zone storage capacity [mm]
            tc    = theta(7);     % Mean residence time [d-1]
            
            % delta_t
            delta_t = obj.delta_t;
            
            % stores
            S1 = S(1);
            S2 = S(2);
            S3 = S(3);
            S4 = S(4);
            S5 = S(5);
            
            % climate input
            t = obj.t;                             % this time step
            climate_in = obj.input_climate(t,:);   % climate at this step
            P  = climate_in(1);
            Ep = climate_in(2);
            T  = climate_in(3);
            
            % fluxes functions
            flux_ps   = snowfall_1(P,T,tcrit);
            flux_pr   = rainfall_1(P,T,tcrit);
            flux_qn   = melt_1(ddf,tcrit,T,S1,delta_t);
            flux_et1  = evap_7(S2,s2max,Ep,delta_t);
            flux_q1f  = saturation_1(flux_pr+flux_qn,S2,s2max);
            flux_qw   = recharge_3(tw,S2);
            flux_et2  = evap_7(S3,se,Ep,delta_t);
            flux_q2u  = baseflow_1(tu,S3);
            flux_qf   = baseflow_1(tc,S4);
            flux_qs   = baseflow_1(tc,S5);

            % stores ODEs
            dS1 = flux_ps - flux_qn;
            dS2 = flux_pr + flux_qn - flux_et1 - flux_q1f - flux_qw;
            dS3 = flux_qw - flux_et2 - flux_q2u;    
            dS4 = flux_q1f - flux_qf;    
            dS5 = flux_q2u - flux_qs; 
            
            
            % outputs
            dS = [dS1 dS2 dS3 dS4 dS5];
            fluxes = [flux_ps, flux_pr,  flux_qn,  flux_et1, flux_q1f,...
                      flux_qw, flux_et2, flux_q2u, flux_qf,  flux_qs];
        end