class_docstr: Base support for FSL commands.
code: def _output_update(self):
      self._output_type = self.inputs.output_type
      self.inputs.environ.update(
          {"FSLOUTPUTTYPE": self.inputs.output_type}
      )
  
imports: from glob import glob
  import os
  from ...None import logging
  from ...utils.filemanip import fname_presuffix
  from ..base import traits, isdefined, CommandLine, CommandLineInputSpec, PackageInfo
  from ...external.due import BibTeX
label_desc: Use image node_id 2 for calling the FSLCommand obj's underlying member method code with example usage: obj._output_update() without return types