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: GuiText.m
    path of file: ./repos/AI-mag/src/inductor_design/+gui
    
    the code of the file until where you have to start completion: classdef GuiText < handle
    % Class for displaying formatted text in a GUI.
    %
    %    Set text and title.
    %    Manage margin and position.
    %    Set visibility.
    %
    %    (c)
    
function self = GuiText(parent, offset, margin_col)
            % Constructor.
            %
            %    Parameters:
            %        parent (obj): parent object to create the feature
            %        offset (float): vertical margin (pixels units)
            %        offset (vector): horizontal margin for title and columns (pixels units)
            
            % create panel
            self.panel = uipanel(parent, 'BorderType', 'none', 'Units', 'normalized', 'Position', [0 0 1 1]);
            
            % do not create the axis
            self.offset = offset;
            self.margin_col = margin_col;
            self.h_vec = [];
        end