Added comment

Author: vsubhuman

rust/pkg/cardano_serialization_lib.js.flow

@@ -2800,6 +2800,9 @@ declare export class NativeScript {
   as_timelock_expiry(): TimelockExpiry | void;
 
   /**
+   * Returns an array of unique Ed25519KeyHashes
+   * contained within this script recursively on any depth level.
+   * The order of the keys in the result is not determined in any way.
    * @returns {Ed25519KeyHashes}
    */
   get_required_signers(): Ed25519KeyHashes;

rust/src/lib.rs

@@ -1725,7 +1725,10 @@ impl NativeScript {
         }
     }
 
-    pub fn get_required_signers(&self) -> RequiredSigners {
+    /// Returns an array of unique Ed25519KeyHashes
+    /// contained within this script recursively on any depth level.
+    /// The order of the keys in the result is not determined in any way.
+    pub fn get_required_signers(&self) -> Ed25519KeyHashes {
         Ed25519KeyHashes(
             RequiredSignersSet::from(self).iter()
                 .map(|k| { k.clone() }).collect()