code: def test_syncwarp(self):
      @jit.rawkernel()
      def f(x):
          laneId = jit.threadIdx.x & 0x1F
          if laneId < 16:
              x[laneId] = 1
          else:
              x[laneId] = 2
          jit.syncwarp()
  
      x = cupy.zeros((32,), dtype=numpy.int32)
      y = cupy.ones_like(x)
      f((1,), (32,), (x,))
      y[16:] += 1
      assert bool((x == y).all())
  
imports: import numpy
  import pytest
  import cupy
  from cupyx import jit
  from cupy import testing
  from cupy.cuda import device
  from cupy.cuda import runtime
label_desc: Use image node_id 20 for calling the TestRaw obj's underlying member method code with example usage: obj.test_syncwarp() without return types