proc collisionLayer(self: PhysicsBody): int64 {.
gcsafe, locks: 0, raises: [], tags: []
.}

proc collisionLayer=(self: PhysicsBody; val: int64) {.
gcsafe, locks: 0, raises: [],
    tags: []
.}

proc collisionMask(self: PhysicsBody): int64 {.
gcsafe, locks: 0, raises: [], tags: []
.}

proc collisionMask=(self: PhysicsBody; val: int64) {.
gcsafe, locks: 0, raises: [],
    tags: []
.}

proc setCollisionMaskBit(self: PhysicsBody; bit: int64; value: bool) {.
gcsafe, locks: 0,
    raises: [], tags: []
.}

proc getCollisionMaskBit(self: PhysicsBody; bit: int64): bool {.
gcsafe, locks: 0,
    raises: [], tags: []
.}

proc setCollisionLayerBit(self: PhysicsBody; bit: int64; value: bool) {.
gcsafe,
    locks: 0, raises: [], tags: []
.}

proc getCollisionLayerBit(self: PhysicsBody; bit: int64): bool {.
gcsafe, locks: 0,
    raises: [], tags: []
.}

proc addCollisionExceptionWith(self: PhysicsBody; body: Object) {.
gcsafe, locks: 0,
    raises: [], tags: []
.}

proc removeCollisionExceptionWith(self: PhysicsBody; body: Object) {.
gcsafe, locks: 0,
    raises: [], tags: []
.}

method setLayers(self: PhysicsBody; mask: int64) {.
gcsafe, locks: 0, raises: [], tags: []
.}

method getLayers(self: PhysicsBody): int64 {.
gcsafe, locks: 0, raises: [], tags: []
.}