The level a name or its first letter denotes, case-insensitively (the
reference's FromStr: low/l, medium/m, quartile/q,
high/h). Anything else throws an Error carrying the reference's
message, which is a bare string there rather than an error variant.
The level a name or its first letter denotes, case-insensitively (the reference's
FromStr:low/l,medium/m,quartile/q,high/h). Anything else throws anErrorcarrying the reference's message, which is a bare string there rather than an error variant.