Revert visibility change to Lifetime property

Author: AzureMarker

chalk-integration/src/interner.rs

@@ -102,7 +102,7 @@ impl Interner for ChalkIr {
         fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
         tls::with_current_program(|prog| Some(prog?.debug_lifetime(lifetime, fmt)))
-            .or_else(|| Some(write!(fmt, "{:?}", lifetime.interned)))
+            .or_else(|| Some(write!(fmt, "{:?}", lifetime.interned())))
     }
 
     fn debug_parameter(

chalk-ir/src/lib.rs

@@ -637,7 +637,7 @@ pub struct Fn<I: Interner> {
 
 #[derive(Copy, Clone, PartialEq, Eq, Hash, PartialOrd, Ord, HasInterner)]
 pub struct Lifetime<I: Interner> {
-    pub interned: I::InternedLifetime,
+    interned: I::InternedLifetime,
 }
 
 impl<I: Interner> Lifetime<I> {