add comment about ExtractInto*Ptr being for internal use only
diff --git a/results.go b/results.go
index cc961d0..899f2a4 100644
--- a/results.go
+++ b/results.go
@@ -89,6 +89,8 @@
// ExtractIntoStructPtr will unmarshal the Result (r) into the provided
// interface{} (to).
//
+// NOTE: For internal use only
+//
// `to` must be a pointer to an underlying struct type
//
// If provided, `label` will be filtered out of the response
@@ -109,6 +111,8 @@
// ExtractIntoSlicePtr will unmarshal the Result (r) into the provided
// interface{} (to).
//
+// NOTE: For internal use only
+//
// `to` must be a pointer to an underlying slice type
//
// If provided, `label` will be filtered out of the response