question: public ProtectedProperties ( Properties props ) { Enumeration < ? > propEnum = props . propertyNames ( ) ; while ( propEnum . hasMoreElements ( ) ) { String propName = ( String ) propEnum . nextElement ( ) ; String propValue = props . getProperty ( propName ) ; super . setProperty ( propName , propValue ) ; } closed = true ; }
target:  Creates a set of protected properties from a set of normal ones.