Method isInternedMapping

src/jvm/clojure/lang/Namespace.java:57–61

An interned mapping is one where a var's ns matches the current ns and its sym matches the mapping key. Once established, interned mappings should never change.

(Symbol sym, Object o)

 * Once established, interned mappings should never change.
 */
private boolean isInternedMapping(Symbol sym, Object o){
	return(o instanceof Var &&
			((Var) o).ns == this &&
			((Var) o).sym.equals(sym));
}

public Var intern(Symbol sym){
	if(sym.ns != null)