Update hapi-fhir-base/src/main/java/ca/uhn/fhir/rest/gclient/IEntityResult.java

Co-authored-by: Michael Buckley <michaelabuckley@gmail.com>

Author: ibaisi

hapi-fhir-base/src/main/java/ca/uhn/fhir/rest/gclient/IEntityResult.java

@@ -14,6 +14,15 @@ public interface IEntityResult {
 	String getMimeType();
 
 	@NonNull
+     /**
+       * Gets the response body as an InputStream. 
+       * 
+       * <p><strong>Warning:</strong> The returned stream can only be read once.
+       * Subsequent calls to this method will return the same exhausted stream.
+       * Consider copying the content to a byte array if multiple reads are needed.</p>
+       * 
+       * @return The response body as an InputStream (single-use only)
+       */
 	InputStream getInputStream();
 
 	int getStatusCode();