code: def get_fastq_files_props(self,barcode=None):
          
          fastqs = self.get_fastq_dxfile_objects(barcode=barcode)   #FastqNotFound Exception here if no FASTQs found for specified barcode.
          dico = {}
          for f in fastqs:
              #props = dxpy.api.file_describe(object_id=f.id, input_params={"fields": {"properties": True}})["properties"]
              props = f.get_properties()
              dico[f] = props
              dico[f]["fastq_file_name"] = f.name
          return dico
docs: Returns the DNAnexus file properties for all FASTQ files in the project that match the 
          specified barcode, or all FASTQ files if not barcode is specified.
    
          Args:
              barcode: `str`. If set, then only FASTQ file properties for FASTQ files having the specified barcode are returned.
    
          Returns:
              `dict`. Keys are the FASTQ file DXFile objects; values are the dict of associated properties 
              on DNAnexus on the file. In addition to the properties on the file in DNAnexus, an 
              additional property is added here called 'fastq_file_name'.
    
          Raises:
              dnanexus_utils.FastqNotFound exception if no FASTQ files were found.