/**
  * Visits a file node.
  *
  * @param \PDepend\Source\AST\ASTCompilationUnit $compilationUnit
  * @return void
  */
 public function visitCompilationUnit(ASTCompilationUnit $compilationUnit)
 {
     $this->visits[] = get_class($compilationUnit);
     parent::visitCompilationUnit($compilationUnit);
 }