1. DomName('WebGLRenderingContext.stencilOp')
  2. DocsEditable()
void stencilOp(int fail, int zfail, int zpass)

Source 

@DomName('WebGLRenderingContext.stencilOp')
@DocsEditable()
void stencilOp(int fail, int zfail, int zpass) => _blink.BlinkWebGLRenderingContext.instance.stencilOp_Callback_3_(this, fail, zfail, zpass);