class_docstr: Base support for FSL commands.
code: def _overload_extension(self, value, name=None):
      return value + Info.output_type_to_ext(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 6 for calling the FSLCommand obj's underlying member method code with example usage: obj._overload_extension(value, name) and returns: unknown