def METHOD_NAME(backendOptions):
    """Get content from the file attached to a given backend and erase the content from the file."""
    filename = backendOptions.get("FileName")
    if not filename:
        return None
    # get the content of the file
    with open(filename) as fileContent:
        content = fileContent.read()
    # clean the content
    lines = content.split("\n")
    cleanContent = ""
    for line in lines:
        cleanContent += cleaningLog(line)
    # reset the file
    with open(filename, "w") as fileContent:
        pass
    return cleanContent