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: Ctria3.m
    path of file: ./repos/NASTRAN_CoFE/nastran_cofe/cofe_models
    
    the code of the file until where you have to start completion: % Class for isoparametric membrane-bending or plane strain triangular plate elements.
% Anthony Ricciardi
%
classdef Ctria3 < Element
    
    properties
        eid % [uint32] Element identification number.
        pid % [uint32] Property identification number of a PSHELL entry.
        g   % [3,1 uint32] Grid point identification numbers of connection points [G1,G2,
    
function [gdof,p_g]=processPressureLoad_sub(obj,pload)
            R = [2/3 1/6 1/6];
            S = [1/6 1/6 2/3];
            w3 = 1/3; % integration weight factor
            pressureForce_e = zeros(3,1);
            for i = 1:3 
                % Gauss point evaluation
                N = Ctria3.evaluateShapeFunctions(R(i),S(i));
                                
                % pressure at point
                pGauss = N.' .* pload.p(1:3);
                
                % Pressure integration
                pressureForce_e = pressureForce_e + w3*obj.area*pGauss;
            end