configurations {
    // A configuration meant for consumers that need the API of this component
    exposedApi {
        // This configuration is an "outgoing" configuration, it's not meant to be resolved
        canBeResolved = false
        // As an outgoing configuration, explain that consumers may want to consume it
        assert canBeConsumed
    }
    // A configuration meant for consumers that need the implementation of this component
    exposedRuntime {

			// We need to acquire cond.L here to be sure that the Broadcast
			// below won't occur before the call to Wait, which would result
			// in a missed signal (and deadlock).
			cond.L.Lock()
			defer cond.L.Unlock()

			// If multiple goroutines are waiting on cond simultaneously,
			// we need to make sure we wake up exactly this one.
			// That means that we need to Broadcast to all of the goroutines,

			throw("invalid g status")

		case _Gdead:
			// Nothing to suspend.
			//
			// preemptStop may need to be cleared, but
			// doing that here could race with goroutine
			// reuse. Instead, goexit0 clears it.
			return suspendGState{dead: true}

		case _Gcopystack:
			// The stack is being copied. We need to wait
			// until this is done.

		case _Gpreempted:
			// We (or someone else) suspended the G. Claim

configurations {
    // A configuration meant for consumers that need the API of this component
    create("exposedApi") {
        // This configuration is an "outgoing" configuration, it's not meant to be resolved
        isCanBeResolved = false
        // As an outgoing configuration, explain that consumers may want to consume it
        assert(isCanBeConsumed)
    }
    // A configuration meant for consumers that need the implementation of this component

```

### 2. Add the Analyzer to All()

In order to be run, analyzers need to be registered in the [analyzers.All()](https://github.com/istio/istio/blob/master/pkg/config/analysis/analyzers/all.go) function. Add your analyzer as an entry there.

### 3. Create new message types

If your analyzer requires any new message types (meaning a unique template and error code), you will need to do the following:

func (f *File) AddGodebug(key, value string) error {
	need := true
	for _, g := range f.Godebug {
		if g.Key == key {
			if need {
				g.Value = value
				f.Syntax.updateLine(g.Syntax, "godebug", key+"="+value)
				need = false
			} else {
				g.Syntax.markRemoved()
				*g = Godebug{}
			}
		}
	}

	if need {
		f.addNewGodebug(key, value)
	}
	return nil
}

    def "throws exception when removing a task with #description"() {
        given:
        buildFile << """
            task foo(type: Zip) {}
            ${code}

            // need at least one task to execute anything
            task dummy
        """

        when:
        fails ("dummy")

        then:

func critical(f *Func) {
	// maps from phi arg ID to the new block created for that argument
	blocks := f.Cache.allocBlockSlice(f.NumValues())
	defer f.Cache.freeBlockSlice(blocks)
	// need to iterate over f.Blocks without range, as we might
	// need to split critical edges on newly constructed blocks
	for j := 0; j < len(f.Blocks); j++ {
		b := f.Blocks[j]
		if len(b.Preds) <= 1 {
			continue
		}

		var phi *Value

      handleAllCompleted();
      return;
    }

    // NOTE: If we ever want to use a custom executor here, have a look at CombinedFuture as we'll
    // need to handle RejectedExecutionException

    if (allMustSucceed) {
      // We need fail fast, so we have to keep track of which future failed so we can propagate
      // the exception immediately

When you are switching branches back and forth, the local results get rebuilt over and over again, even if you are building something that has already been built before.
The build cache remembers the earlier build results, and greatly reduces the need to rebuild things when they have already been built locally.
This can also extend to rebuilding different commits, like when running `git bisect`.