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A local time string (i.e., with no associated timezone) in 24-hr HH:mm[:ss[.SSS]] format, e.g. 14:25 or 14:25:06 or 14:25:06.123. The seconds and milliseconds portions are optional. Like the LocalDate scalar, the value is serialized and deserialized as a string as a signal to both clients and resolvers that special care must be taken with the value when converting it to any date/time type that includes a date or timezone, e.g., a JavaScript Date.