@interface GEOVLFGravityVector : PBCodable <NSCopying> { double _x; double _y; double _z; struct { unsigned char has_x : 1; unsigned char has_y : 1; unsigned char has_z : 1; } _flags; } @property (nonatomic) BOOL hasX; @property (nonatomic) double x; @property (nonatomic) BOOL hasY; @property (nonatomic) double y; @property (nonatomic) BOOL hasZ; @property (nonatomic) double z; + (BOOL)isValid:(id)a0; - (unsigned long long)hash; - (BOOL)readFrom:(id)a0; - (void)writeTo:(id)a0; - (id)initWithDictionary:(id)a0; - (id)description; - (id)jsonRepresentation; - (id)dictionaryRepresentation; - (void)copyTo:(id)a0; - (BOOL)isEqual:(id)a0; - (void)readAll:(BOOL)a0; - (void)mergeFrom:(id)a0; - (id)copyWithZone:(struct _NSZone { } *)a0; - (id)initWithJSON:(id)a0; @end