when the target list is being assembled, the items for this rule go first. If more that one rule defines a first item (for a given instance of mapping) then this is an error
when the target list is being assembled, the items for this rule go last. If more that one rule defines a last item (for a given instance of mapping) then this is an error
Returns the enum constant of this type with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this type. (Extraneous whitespace characters are
not permitted.)
Parameters:
name - the name of the enum constant to be returned.