Better document new Bootstrap feature.

lib/bootstrap.js

@@ -148,7 +148,9 @@ var Base = new function() { // Bootstrap scope
 					// the parameters and use the arguments array internally
 					// instead.
 					if (beans && (bean = name.match(/^(get|is)(([A-Z])(.*))$/))
-							// Reg-exp to detect non-hidden parameters
+							// Reg-exp to detect non-hidden parameters. We only
+							// produce beans if there are no parameters or only
+							// hidden ones:
 							&& !/^function\s*\(.*\b[^_,].*\)/.test(val))
 						beans.push([ bean[3].toLowerCase() + bean[4], bean[2] ]);
 				}