Merge pull request #3617 from tsalo/add-genericlabel

[ENH] Add GenericLabel to ANTS ApplyTransforms.

Author: effigies

Diff for: nipype/interfaces/ants/resampling.py

@@ -349,6 +349,7 @@ class ApplyTransformsInputSpec(ANTSCommandInputSpec):
         "MultiLabel",
         "Gaussian",
         "BSpline",
+        "GenericLabel",
         argstr="%s",
         usedefault=True,
     )
@@ -357,6 +358,7 @@ class ApplyTransformsInputSpec(ANTSCommandInputSpec):
         traits.Tuple(
             traits.Float(), traits.Float()  # Gaussian/MultiLabel (sigma, alpha)
         ),
+        traits.Tuple(traits.Str()),  # GenericLabel
     )
     transforms = InputMultiObject(
         traits.Either(File(exists=True), "identity"),
@@ -497,6 +499,7 @@ def _format_arg(self, opt, spec, val):
                 "BSpline",
                 "MultiLabel",
                 "Gaussian",
+                "GenericLabel",
             ] and isdefined(self.inputs.interpolation_parameters):
                 return "--interpolation {}[ {} ]".format(
                     self.inputs.interpolation,