Use non FFT M2L for M2QBXL

Author: isuruf

pytential/qbx/__init__.py

@@ -30,6 +30,8 @@
 from pytential.source import LayerPotentialSourceBase
 from sumpy.expansion import DefaultExpansionFactory as DefaultExpansionFactoryBase
 
+from functools import partial
+
 import logging
 logger = logging.getLogger(__name__)
 
@@ -49,7 +51,12 @@ class DefaultExpansionFactory(DefaultExpansionFactoryBase):
     """A expansion factory to create QBX local, local and multipole expansions
     """
     def get_qbx_local_expansion_class(self, kernel):
-        return self.get_local_expansion_class(kernel)
+        local_expn_class = self.get_local_expansion_class(kernel)
+        from sumpy.expansion.m2l import NonFFTM2LTranslationClassFactory
+        factory = NonFFTM2LTranslationClassFactory()
+        m2l_translation = factory.get_m2l_translation_class(kernel,
+            local_expn_class)()
+        return partial(local_expn_class, m2l_translation=m2l_translation)
 
 
 class _not_provided:  # noqa: N801