Accepts values with an '!important!' priority, and sets it to
LexicalUnit2.SAC_COMPAT_PRIO pseudo-values. Those values must be handled as of
!important priority.
Returns the enum constant of this class with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this class. (Extraneous whitespace characters are
not permitted.)
Parameters:
name - the name of the enum constant to be returned.