LEAF ENUM TYPE issue: after max enum vlaue, next element should come with value. but yang utils genrating code with the least value

RFC6020:
If the current highest value is equal to 2147483647, then an enum
value MUST be specified for "enum" substatements following the one
with the current highest value.

leaf ifType {
type enumeration {
enum "unbounded";
enum ZERO;
enum two;
enum four;
enum seven

{ value 2147483647; }

enum five;

}
}

switch (value)

{ case 1: return IfTypeEnum.ZERO; case 3: return IfTypeEnum.FOUR; case 2147483647: return IfTypeEnum.SEVEN; case 0: return IfTypeEnum.UNBOUNDED; case 2: return IfTypeEnum.TWO; case -2147483648: return IfTypeEnum.FIVE; default : return null; }