@classmethod<EOL><INDENT>def builtin_timescale(cls, name):<DEDENT>
names = {<EOL>'<STR_LIT>': TIMESCALE__ISC,<EOL>'<STR_LIT>': TIMESCALE__USGS_ISC,<EOL>'<STR_LIT>': TIMESCALE__DNAG,<EOL>}<EOL>return cls.from_csv(text=names[name.lower()])<EOL>
Generate a default timescale legend. No arguments.

Returns:
    Legend: The timescale stored in `defaults.py`.