fix(rust): update public info APIs to use usize

Author: Shivendra Devadhe

rust/src/info/edge_info.rs

@@ -202,7 +202,7 @@ impl EdgeInfo {
     /// Return the number of property groups.
     ///
     /// TODO: upstream C++ uses `int` for this return type; prefer fixed-width.
-    pub fn property_group_num(&self) -> i32 {
+    pub fn property_group_num(&self) -> u_size {
         self.0.PropertyGroupNum()
     }
 
@@ -245,7 +245,7 @@ impl EdgeInfo {
     /// Returns `None` if the index is out of range.
     ///
     /// TODO: upstream C++ uses `int` for this parameter; prefer fixed-width.
-    pub fn property_group_by_index(&self, index: i32) -> Option<PropertyGroup> {
+    pub fn property_group_by_index(&self, index: usize) -> Option<PropertyGroup> {
         let sp = self.0.GetPropertyGroupByIndex(index);
         if sp.is_null() {
             None

rust/src/info/vertex_info.rs

@@ -123,7 +123,7 @@ impl VertexInfo {
     /// Return the number of property groups.
     ///
     /// TODO: upstream C++ uses `int` for this return type; prefer fixed-width.
-    pub fn property_group_num(&self) -> i32 {
+    pub fn property_group_num(&self) -> u_size {
         self.0.PropertyGroupNum()
     }
 
@@ -173,7 +173,7 @@ impl VertexInfo {
     /// TODO: upstream C++ uses `int` for this parameter; prefer fixed-width.
     ///
     /// Returns `None` if the index is out of range.
-    pub fn property_group_by_index(&self, index: i32) -> Option<PropertyGroup> {
+    pub fn property_group_by_index(&self, index: usize) -> Option<PropertyGroup> {
         let sp = self.0.GetPropertyGroupByIndex(index);
         if sp.is_null() {
             None