colobot-data/help/cbot/private.txt

\b;Instruction \c;private\n; (for specialists)
\l;Class\u cbot\class; members can be \l;public\u cbot\public; (by default) or private. A member can be declared privat by putting \c;private\n; before the type declaration of the member. Private members are not accessible from outside the class definition.
\c;
\s;public class MyClass
\s;{
\s;	int    b;                // public by défault
\s;	public int a;            // als public 
\s;	private point position;  // privat
\s;}
\s;void Test()
\s;{
\s;	MyClass item;
\s;	item.a = item.b = 12;      // ok
\s;	message( item.position );  // this is an error
\s;}
\n;
\t;See also
\c;\l;class\u cbot\class;\n;, \c;\l;public\u cbot\public;\n;
\l;Programming\u cbot;, \l;types\u cbot\type; and \l;categories\u cbot\category;.