Function rubullet_sys::b3GetStatusMassMatrix

pub unsafe extern "C" fn b3GetStatusMassMatrix(
    physClient: b3PhysicsClientHandle, 
    statusHandle: b3SharedMemoryStatusHandle, 
    dofCount: *mut c_int, 
    massMatrix: *mut f64
) -> c_int

the mass matrix is stored in column-major layout of size dofCount*dofCount