Rename PcdCommitments::emtpy() to new_empty()

src/pcd.rs

@@ -221,7 +221,7 @@ impl PcdCommitments {
         Ok(Self(field2hash))
     }
 
-    pub fn empty() -> Self {
+    pub fn new_empty() -> Self {
         Self(BTreeMap::new())
     }
 

src/prd.rs

@@ -78,7 +78,7 @@ impl Prd {
         Self {
             prd_type: PrdType::Connect,
             process_id: OutPoint::null(),
-            pcd_commitments: PcdCommitments::empty(),
+            pcd_commitments: PcdCommitments::new_empty(),
             sender,
             validation_tokens,
             keys: BTreeMap::new(),