code: def no_fsl_course_data():
      """check if fsl_course data is present"""
      return not (
          "FSL_COURSE_DATA" in os.environ
          and os.path.isdir(
              os.path.abspath(os.environ["FSL_COURSE_DATA"])
          )
      )
  
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 3 for calling a global function with example usage: no_fsl_course_data() and returns: unknown