\documentclass[a4paper,ngerman]{article}

% Make it possible to enable or disable TOC
\newif\ifShowTOC

\documentclass[a4paper,ngerman]{article}

% Make it possible to enable or disable TOC
\newif\ifShowTOC

% Utility stuff, used, for example, in x3-mmd-compat
% That is why we need to include it here, and not in -begin
\usepackage{etoolbox}

Use etoolbox, mainly for checking for undefined macros
Use etoolbox, mainly for checking for undefined macros
