This module provides casing mappings. Beware some mappings are one to many characters.
Iterators
- iterator lowerCase(r: Rune): Rune {...}{.inline, raises: [], tags: [].} 
- Return lower case mapping of r if there is such mapping. Return r otherwise
- iterator upperCase(r: Rune): Rune {...}{.inline, raises: [], tags: [].} 
- Return upper case mapping of r if there is such mapping. Return r otherwise
- iterator titleCase(r: Rune): Rune {...}{.inline, raises: [], tags: [].} 
- Return title case mapping of r if there is such mapping. Return r otherwise
- iterator caseFold(r: Rune): Rune {...}{.inline, raises: [], tags: [].} 
- Return full case fold of r if there is such folding. Return r otherwise. This is meant for internal usage such as caseless text comparison