// Deprecated: ErrMissingContentLength is no longer returned by
	// anything in the net/http package. Callers should not
	// compare errors against this variable.
	ErrMissingContentLength = &ProtocolError{"missing ContentLength in HEAD response"}
)

func badStringError(what, val string) error { return fmt.Errorf("%s %q", what, val) }

// Headers that Request.Write handles itself and should be skipped.
var reqWriteExcludeHeader = map[string]bool{

	// Try directly allocating from the current head arena.
	head := (*gcBitsArena)(atomic.Loadp(unsafe.Pointer(&gcBitsArenas.next)))
	if p := head.tryAlloc(bytesNeeded); p != nil {
		return p
	}

	// There's not enough room in the head arena. We may need to
	// allocate a new arena.
	lock(&gcBitsArenas.lock)
	// Try the head arena again, since it may have changed. Now

          "interval": "1m",
          "intervalFactor": 2,
          "legendFormat": "{{instance}}",
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Total Proxied Head Requests",
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {

aead.dev/mem v0.2.0 h1:ufgkESS9+lHV/GUjxgc2ObF43FLZGSemh+W+y27QFMI=
aead.dev/mem v0.2.0/go.mod h1:4qj+sh8fjDhlvne9gm/ZaMRIX9EkmDrKOLwmyDtoMWM=
aead.dev/minisign v0.2.0/go.mod h1:zdq6LdSd9TbuSxchxwhpA9zEb9YXcVGoE8JakuiGaIQ=
aead.dev/minisign v0.3.0 h1:8Xafzy5PEVZqYDNP60yJHARlW1eOQtsKNp/Ph2c0vRA=
aead.dev/minisign v0.3.0/go.mod h1:NLvG3Uoq3skkRMDuc3YHpWUTMTrSExqm+Ij73W13F6Y=
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=

			if err := cache.RemovePod(logger, pod); err == nil {
				t.Error("expected error, no error found")
			}

			// Node that owned the Pod should be at the head of the list.
			if cache.headNode.info.Node().Name != nodeName {
				t.Errorf("node %q is not at the head of the list", nodeName)
			}
		})
	}
}

func TestForgetPod(t *testing.T) {
	nodeName := "node"

      }
      return %0 : tensor<32xf32>
    }
```
### `-tf-extract-head-tail-outside-compilation`

_Extracts head or tail outside compilation to separate host launches before/after device cluster._

This pass extracts a CPU computation cluster with `_xla_outside_compilation`
annotation from the head or tail of a Device cluster.

For example:

```mlir
  %cluster = "tf_device.cluster"() ( {

	{118, "ENOSR", "out of STREAMS resources"},
	{119, "ETIME", "system call timed out"},
	{120, "EBADMSG", "next message has wrong type"},
	{121, "EPROTO", "error in protocol"},
	{122, "ENODATA", "no message on stream head read q"},
	{123, "ENOSTR", "fd not associated with a stream"},
	{124, "ENOTSUP", "unsupported attribute value"},
	{125, "EMULTIHOP", "multihop is not allowed"},
	{126, "ENOLINK", "the server link has been severed"},

	{118, "ENOSR", "out of STREAMS resources"},
	{119, "ETIME", "system call timed out"},
	{120, "EBADMSG", "next message has wrong type"},
	{121, "EPROTO", "error in protocol"},
	{122, "ENODATA", "no message on stream head read q"},
	{123, "ENOSTR", "fd not associated with a stream"},
	{124, "ENOTSUP", "unsupported attribute value"},
	{125, "EMULTIHOP", "multihop is not allowed"},
	{126, "ENOLINK", "the server link has been severed"},

    builder.setInsertionPointToEnd(&host_computation_block);

    // map_outside_compilation with return values from host is not implemented.
    // This would only be needed if head-tail-outside-compilation supports
    // map_outside_compilation";
    assert(core == 0 || return_value_from_host.empty());

    // Create a single launch op for all outside compiled ops.

			if readable && writable {
				return "TRUE"
			}
			return "FALSE"
		}(),
	})

	writeSuccessResponseXML(w, encodedSuccessResponse)
}

// HeadBucketHandler - HEAD Bucket
// ----------
// This operation is useful to determine if a bucket exists.
// The operation returns a 200 OK if the bucket exists and you
// have permission to access it. Otherwise, the operation might