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: SO2.m
    path of file: ./repos/Robotics-Toolbox/rvctools/release10.3.1/robot
    
    the code of the file until where you have to start completion: %SO2 Representation of 2D rotation
%
% This subclasss of RTBPose is an object that represents an SO(2) rotation
%
% Constructor methods::
%  SO2          general constructor
%  SO2.exp      exponentiate an so(2) matrix
%  SO2.rand     random orientation
%  new          new SO2 object
%
% Information and test methods::
%  dim*         returns 2
%  is
    
function TT = T(obj)
            %SO2.T  Get homogeneous transformation matrix
            %
            % T = P.T() is the homogeneous transformation matrix (3x3) associated with the
            % SO2 object P, and has zero translational component.  If P is a vector
            % (1xN) then T (3x3xN) is a stack of rotation matrices, with the third
            % dimension corresponding to the index of P.
            %
            % See also SO2.T.
            TT = zeros(3,3,length(obj));
            for i=1:length(obj)
                TT(1:2,1:2,i) = obj(i).data(1:2,1:2);
                TT(3,3,i) = 1;
            end