': Returns information on how to handle an axis that has string data.
= INPUT VARIABLES
- axis    The axis using this converter.
- unit    The units to use for a axis with string data.
= RETURN VALUE
- Returns a matplotlib AxisInfo data structure that contains
minor/major formatters, major/minor locators, and default
label information.'

@staticmethod
def axisinfo(unit, axis):

    return None
