Specify that encrypted contents is only visible if explicitly stated.

Closes #2318

chapters/annotations.tex

@@ -1748,8 +1748,8 @@ \section{Annotations for Access Control to Protect Intellectual Property}\double
 \subsection{Protection of Classes}\doublelabel{protection-of-classes}
 
 A class may have the following annotations to define what parts of a
-class are visible (if a class is encrypted and no Protection annotation
-is defined, the access annotation has the default value
+class are visible, and only the parts explicitly listed as visible below can be accessed
+(if a class is encrypted and no Protection annotation is defined, the access annotation has the default value
 \lstinline!Access.documentation!):
 
 \begin{lstlisting}[language=modelica]