public EntityImpl() throws Exception {
factory = Outside.service(this, "gus.io.printstream.factory.multi.hist");
p1 = (PrintStream) factory.g();
((P) p1).p(System.err);
System.setErr(p1);
}
public Object t(Object obj) throws Exception {
Object[] o = (Object[]) obj;
if (o.length != 2) throw new Exception("Wrong data number: " + o.length);
obj = o[0];
if (obj == null) return Boolean.FALSE;
if (!(obj instanceof String)) return Boolean.FALSE;
return new Boolean(System.getProperties().containsKey((String) obj));
}