def METHOD_NAME(self,field,filename):
    field=self.fc(field)
    files=self.get_files(field)
    status=self.get_status(field)
    if filename not in files or filename not in status:
        raise RuntimeError('Staging nonexistent file')
    status=status[filename]
    number=files[filename]
    if status=='DUL':
        return 'Online'
    else:
        r=request_with_retry(self.url+field+'/stage/'+str(number)+self.tokenstr,rfunction=requests.post)
        return 'Staged'