MTLStencilOperation.keep A stencil operation that doesn’t modify a stencil value. Declarationcase keep See AlsoStencil operationsMTLStencilOperation.zeroMTLStencilOperation.replaceMTLStencilOperation.incrementClampMTLStencilOperation.decrementClampMTLStencilOperation.invertMTLStencilOperation.incrementWrapMTLStencilOperation.decrementWrap