RUST-989 Update index management struct visibility (#431)

Author: isabelatkinson

src/index/mod.rs

@@ -16,11 +16,11 @@ pub struct IndexModel {
     /// Specifies the index’s fields. For each field, specify a key-value pair in which the key is
     /// the name of the field to index and the value is index type.
     #[serde(rename = "key")]
-    keys: Document,
+    pub keys: Document,
 
     /// The options for the index.
     #[serde(flatten)]
-    options: Option<IndexOptions>,
+    pub options: Option<IndexOptions>,
 }
 
 impl IndexModel {

src/results.rs

@@ -80,6 +80,7 @@ pub struct DeleteResult {
 /// Information about the index created as a result of a
 /// [`Collection::create_index`](../struct.Collection.html#method.create_index).
 #[derive(Debug, Clone, PartialEq)]
+#[non_exhaustive]
 pub struct CreateIndexResult {
     /// The name of the index created in the `createIndex` command.
     pub index_name: String,
@@ -117,6 +118,7 @@ impl From<CreateIndexesResult> for CreateIndexResult {
 /// Information about the indexes created as a result of a
 /// [`Collection::create_indexes`](../struct.Collection.html#method.create_indexes).
 #[derive(Debug, Clone, PartialEq)]
+#[non_exhaustive]
 pub struct CreateIndexesResult {
     /// The list containing the names of all indexes created in the `createIndexes` command.
     pub index_names: Vec<String>,