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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_filesystem_config(file_types):
 """Retrieve filesystem configuration, including support for specified file types. """

    out = "     filesystems {\n"
    for file_type in sorted(list(file_types)):
        if file_type in _FILESYSTEM_CONFIG:
            out += _FILESYSTEM_CONFIG[file_type]
    out += "      }\n"
    return out