1"flat_key","key","int_value","string_value" 2"is_root_in_scope","is_root_in_scope",1,"[NULL]" 3"source","source","[NULL]","descriptor" 4"source_id","source_id",1,"[NULL]" 5"source","source","[NULL]","chrome" 6"source_id","source_id",1234,"[NULL]" 7"source_id_is_process_scoped","source_id_is_process_scoped",0,"[NULL]" 8"source_scope","source_scope","[NULL]","cat" 9"debug.debug1.key1","debug.debug1.key1",10,"[NULL]" 10"debug.debug1.key2","debug.debug1.key2[0]",20,"[NULL]" 11"debug.debug1.key2","debug.debug1.key2[1]",21,"[NULL]" 12"debug.debug1.key2","debug.debug1.key2[2]",22,"[NULL]" 13"debug.debug1.key2","debug.debug1.key2[3]",23,"[NULL]" 14"debug.debug1.key3","debug.debug1.key3",30,"[NULL]" 15"debug.debug2.key1","debug.debug2.key1",10,"[NULL]" 16"debug.debug2.key2","debug.debug2.key2[0]",20,"[NULL]" 17"debug.debug2.key2","debug.debug2.key2[1]",21,"[NULL]" 18"debug.debug2.key2","debug.debug2.key2[2]",22,"[NULL]" 19"debug.debug2.key2","debug.debug2.key2[3]",23,"[NULL]" 20"debug.debug2.key3.key31","debug.debug2.key3.key31",31,"[NULL]" 21"debug.debug2.key3.key32","debug.debug2.key3.key32",32,"[NULL]" 22"debug.debug2.key4","debug.debug2.key4",40,"[NULL]" 23"debug.debug3","debug.debug3",32,"[NULL]" 24"debug.debug4.key1","debug.debug4.key1",10,"[NULL]" 25"debug.debug4.key2[0]","debug.debug4.key2[0]",20,"[NULL]" 26"debug.debug4.key2[1]","debug.debug4.key2[1]",21,"[NULL]" 27"legacy_event.passthrough_utid","legacy_event.passthrough_utid",1,"[NULL]" 28