def METHOD_NAME(common_file_base, child):
    """
    Get the file base for outputs.
    Input:
        common_file_base[str]: The default file base
        child[BlockInfo]: Child node of /Outputs
    Return:
        str: file base
    """
    file_base = "%s_%s" % (common_file_base, child.name)
    file_base_param = child.getParamInfo("file_base")
    if file_base_param and file_base_param.value:
        file_base = file_base_param.value
    return file_base