// GatewayAPIController holds a reference to the gateway API controller.
	GatewayAPIController GatewayController

	// cache gateways addresses for each network
	// this is mainly used for kubernetes multi-cluster scenario
	networkMgr *NetworkManager

	Networks *meshconfig.MeshNetworks

	InitDone        atomic.Bool
	initializeMutex sync.Mutex
	ambientIndex    AmbientIndexes
}

var _ T
`
	_, err := typecheck(src1, &conf, nil)
	if err == nil || !strings.HasSuffix(err.Error(), " [go.dev/e/UndeclaredName]") {
		t.Errorf("src1: unexpected error: got %v", err)
	}

	// test case for a multi-line error
	const src2 = `
package p
func f() int { return 0 }
var _ = f(1, 2)
`
	_, err = typecheck(src2, &conf, nil)
	if err == nil || !strings.Contains(err.Error(), " [go.dev/e/WrongArgCount]\n") {

			// happens with a function with a trailing
			// ref-qualifier.
			mwq.Qualifiers = mergeQualifiers(q, mwq.Qualifiers)
		} else {
			// Merge adjacent qualifiers.  This case
			// happens with multi-dimensional array types.
			if qsub, ok := ret.(*TypeWithQualifiers); ok {
				q = mergeQualifiers(q, qsub.Qualifiers)
				ret = qsub.Base
			}
			ret = &TypeWithQualifiers{Base: ret, Qualifiers: q}
		}

		}

		// Scan to colon. A space, a quote or a control character is a syntax error.
		// Strictly speaking, control chars include the range [0x7f, 0x9f], not just
		// [0x00, 0x1f], but in practice, we ignore the multi-byte control characters
		// as it is simpler to inspect the tag's bytes than the tag's runes.
		i = 0
		for i < len(tag) && tag[i] > ' ' && tag[i] != ':' && tag[i] != '"' && tag[i] != 0x7f {
			i++
		}