Function isInternal

lib/internal/child_process.js:997–1004

(message)

const INTERNAL_PREFIX = 'NODE_';
function isInternal(message) {
  return (message !== null &&
          typeof message === 'object' &&
          typeof message.cmd === 'string' &&
          message.cmd.length > INTERNAL_PREFIX.length &&
          StringPrototypeSlice(message.cmd, 0, INTERNAL_PREFIX.length) ===
            INTERNAL_PREFIX);
}

const nop = FunctionPrototype;