presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/metadata/MetadataConfig.java/MetadataConfig/setStartupGracePeriod
class MetadataConfig:    @Config("raptor.startup-grace-period")
    @ConfigDescription("Minimum uptime before allowing bucket or shard reassignments")
    public MetadataConfig setStartupGracePeriod(Duration startupGracePeriod)
    {
        this.startupGracePeriod = startupGracePeriod;
        return this;
    }