function isAncestor(instA, instB) {
  !('_hostNode' in instA) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'isAncestor: Invalid argument.') : _prodInvariant('35') : void 0;
  !('_hostNode' in instB) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'isAncestor: Invalid argument.') : _prodInvariant('35') : void 0;

  while (instB) {
    if (instB === instA) {
      return true;
    }
    instB = instB._hostParent;
  }
  return false;
}
Creates the markup for this text node. This node is not intended to have
any features besides containing text content.

@param {ReactReconcileTransaction|ReactServerRenderingTransaction} transaction
@return {string} Markup for this text node.
@internal