let fieldmap_id be optional

psadil · psadil · commit 64269beeec9a · 2024-10-02T11:22:07.000-04:00
diff --git a/fmriprep/utils/bids.py b/fmriprep/utils/bids.py
@@ -41,7 +41,7 @@
 def collect_derivatives(
     derivatives_dir: Path,
     entities: dict,
-    fieldmap_id: str | None,
+    fieldmap_id: str | None = None,
     spec: dict | None = None,
     patterns: list[str] | None = None,
 ):
