From ec320cbdaaebf3ce22f65f81bc95bab06d6197f6 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Sun, 25 Mar 2018 20:24:34 -0500
Subject: [PATCH] WIP mini-step towards GeometryCollection

---
 pytential/qbx/__init__.py | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/pytential/qbx/__init__.py b/pytential/qbx/__init__.py
index d5d52ca6..31538d56 100644
--- a/pytential/qbx/__init__.py
+++ b/pytential/qbx/__init__.py
@@ -38,12 +38,43 @@ logger = logging.getLogger(__name__)
 
 
 __doc__ = """
+.. autoclass:: GeometryCollection
 .. autoclass:: QBXLayerPotentialSource
 
 .. autoclass:: QBXTargetAssociationFailedException
 """
 
 
+# {{{ GeometryCollection
+
+class GeometryCollection:
+    """
+    .. attribute:: places
+    .. attribute:: refined_places
+    """
+
+    def __init__(self, places):
+        """
+        :arg places: a mapping of symbolic names to
+            :class:`pytential.discretization.Discretization` objects or a subclass
+            of :class:`pytential.discretization.target.TargetBase`.
+        """
+        pass
+
+    def drive_refinement(self, get_refiner):
+        # This needs to construct all sources' QBX centers and refine other
+        # sources for them.
+        pass
+
+    def __getitem__(self, name):
+        pass
+
+    def _tree_for_source(self, name):
+        pass
+
+# }}}
+
+
 # {{{ QBX layer potential source
 
 class _not_provided:  # noqa: N801
-- 
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