backport #410 (#416)

Author: khieta

cedar-drt/fuzz/fuzz_targets/roundtrip.rs

@@ -95,7 +95,7 @@ fn round_trip_json(p: StaticPolicy) -> StaticPolicy {
     // read back
     let est: est::Policy = serde_json::from_value(json).expect("failed to parse EST from JSON");
     let template = est
-        .try_into_ast_template(None)
+        .try_into_ast_policy_or_template(None)
         .expect("failed to convert EST to AST");
     template
         .try_into()
@@ -120,7 +120,7 @@ fn round_trip_est(p: &StaticPolicy) -> StaticPolicy {
     });
     let est: est::Policy = serde_json::from_value(json).expect("failed to parse EST from JSON");
     let template = est
-        .try_into_ast_template(None)
+        .try_into_ast_policy_or_template(None)
         .expect("failed to convert EST to AST");
     template
         .try_into()