return nil // channel elements are not identical.
		}
		if ch.Dir() == types.SendRecv {
			// ch is bidirectional. We can safely always use curr's direction.
			ch = curr
		} else if curr.Dir() != types.SendRecv && ch.Dir() != curr.Dir() {
			// ch and curr are not bidirectional and not the same direction.
			return nil
		}
	}
	return ch
}

			// T implements V, so give hint about type assertion.
			if cause != nil {
				*cause = "need type assertion"
			}
			return false, IncompatibleAssign
		}
	}

	// x is a bidirectional channel value, T is a channel
	// type, x's type V and T have identical element types,
	// and at least one of V or T is not a named type.
	if Vc, ok := Vu.(*Chan); ok && Vc.dir == SendRecv {

			// T implements V, so give hint about type assertion.
			if cause != nil {
				*cause = "need type assertion"
			}
			return false, IncompatibleAssign
		}
	}

	// x is a bidirectional channel value, T is a channel
	// type, x's type V and T have identical element types,
	// and at least one of V or T is not a named type.
	if Vc, ok := Vu.(*Chan); ok && Vc.dir == SendRecv {

	// Buffers sent on out can not be referenced once sent.
	StreamHandlerFn func(ctx context.Context, payload []byte, in <-chan []byte, out chan<- []byte) *RemoteErr

	// StreamHandler handles fully bidirectional streams,
	// There is flow control in both directions.
	StreamHandler struct {
		// Handle an incoming request. Initial payload is sent.
		// Additional input packets (if any) are streamed to request.

              name: sys-fs
              # Bidirectional is required to ensure that the new mount we make at /sys/fs/bpf propagates to the host
              # so that it outlives the init container.
              mountPropagation: Bidirectional
            - mountPath: /var/run/calico
              name: var-run-calico

           TFL_StatefulOp,
           QuantizableResult,
           DynamicRangeQuantizedOpInterface]> {
  let summary = "Bidirectional sequence lstm operator";

  let description = [{
    Bidirectional lstm is essentially two lstms, one running forward & the
    other running backward. And the output is the concatenation of the two
    lstms.
  }];

  let arguments = (

</pre>

<p>
The optional <code>&lt;-</code> operator specifies the channel <i>direction</i>,
<i>send</i> or <i>receive</i>. If a direction is given, the channel is <i>directional</i>,
otherwise it is <i>bidirectional</i>.
A channel may be constrained only to send or only to receive by
<a href="#Assignment_statements">assignment</a> or
explicit <a href="#Conversions">conversion</a>.
</p>

<pre>

// https://golang.org/doc/go_spec.html#Assignability
// T and V must be both of Chan kind.
func specialChannelAssignability(T, V *abi.Type) bool {
	// Special case:
	// x is a bidirectional channel value, T is a channel type,
	// x's type V and T have identical element types,
	// and at least one of V or T is not a defined type.

		// Pods with Bidirectional propagation in non-privileged containers.
		return allErrs
	}

	privileged := container.SecurityContext != nil && container.SecurityContext.Privileged != nil && *container.SecurityContext.Privileged
	if *mountPropagation == core.MountPropagationBidirectional && !privileged {

		// non-privileged container + None
		core.VolumeMount{Name: "foo", MountPath: "/foo", MountPropagation: &propagationNone},
		defaultContainer,
		false,
	}, {
		// error: implicitly non-privileged container + Bidirectional
		core.VolumeMount{Name: "foo", MountPath: "/foo", MountPropagation: &propagationBidirectional},
		defaultContainer,
		true,
	}, {
		// explicitly non-privileged container + no propagation