keyvalToLower
Converts a key value to lower case, if applicable.
Return
the lower case form of @keyval, or @keyval itself if it is already in lower case or it is not subject to case conversion.
Parameters
keyval
a key value.
Converts a key value to lower case, if applicable.
the lower case form of @keyval, or @keyval itself if it is already in lower case or it is not subject to case conversion.
a key value.