pub fn CreateParticleGroupDef(
flags: c_uint,
groupFlags: c_uint,
position: b2Vec2,
angle: f32,
linearVelocity: b2Vec2,
angularVelocity: f32,
strength: f32,
shape: &b2Shape,
stride: f32,
lifetime: f32,
) -> *mut b2ParticleGroupDef