this.endDate = this.oldEndDate.clone();
            }

            //if a new date range was selected, invoke the user callback function
            if (!this.startDate.isSame(this.oldStartDate) || !this.endDate.isSame(this.oldEndDate))
                this.callback(this.startDate.clone(), this.endDate.clone(), this.chosenLabel);

            //if picker is attached to a text input, update it

		case <-ctx.Done():
			r.err = ctx.Err()
			return ctx.Err()
		case dst <- meta:
		}
	}
}

// readFn will return all remaining objects
// and provide a callback for each entry read in order
// as long as true is returned on the callback.
func (r *metacacheReader) readFn(fn func(entry metaCacheEntry) bool) error {
	r.checkInit()
	if r.err != nil {
		return r.err
	}
	if r.current.name != "" {

import java.io.FileOutputStream;
import java.nio.file.Files;
import java.util.List;
import java.util.Map;
import java.util.jar.JarEntry;
import java.util.jar.JarOutputStream;

import org.codelibs.fess.ds.callback.IndexUpdateCallback;
import org.codelibs.fess.entity.DataStoreParams;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.opensearch.config.exentity.DataConfig;
import org.codelibs.fess.unit.UnitFessTestCase;

        public RequestOptionCall<DeleteRequestBuilder> deleteOption() {
            return deleteOption;
        }
    }

    @FunctionalInterface
    public interface RequestOptionCall<OP> {
        void callback(OP op);
    }

 * **Synchronous:** your thread blocks until the response is readable.
 * **Asynchronous:** you enqueue the request on any thread, and get [called back](https://square.github.io/okhttp/5.x/okhttp/okhttp3/-callback/) on another thread when the response is readable.

    /**
     * Validates the password and confirmation fields in the form for user creation and update.
     *
     * @param form the form containing password and confirmation fields
     * @param validationErrorLambda callback to report validation errors
     */
    protected void verifyPassword(final CreateForm form, final VaErrorHook validationErrorLambda) {
        if (form.crudMode == CrudMode.CREATE && StringUtil.isBlank(form.password)) {

}
```

#### 4.5.2 Fallback TCP Provider
```java
package jcifs.internal.smb2.rdma.tcp;

public class TcpRdmaProvider implements RdmaProvider {
    @Override
    public boolean isAvailable() {
        return true;  // TCP is always available
    }
    
    @Override
    public Set<RdmaCapability> getSupportedCapabilities() {
        // TCP fallback only supports send/receive

    protected void async(final AsyncManager asyncManager, final Runnable runnable) {
        asyncManager.async(new ConcurrentAsyncCall() {
            @Override
            public void callback() {
                runnable.run();
            }

            @Override
            public boolean asPrimary() {
                return true; // mail is primary business
            }
        });

utilizar o [MotorClient do MongoDB](https://stackoverflow.com/questions/41584243/runtimeerror-task-attached-to-a-different-loop)) Lembre-se de instanciar objetos que precisam de um loop de eventos (*event loop*) apenas em funções assíncronas, e.g. um callback `@app.on_event("startup")`.

///...

            String modelVersion = modelVersionElement.textContentTrimmed();
            if (!modelVersion.isEmpty()) {
                return modelVersion;
            }
        }

        // Fallback to namespace URI detection
        String namespaceUri = root.namespaceDeclaration(null);
        if (MAVEN_4_2_0_NAMESPACE.equals(namespaceUri)) {
            return MODEL_VERSION_4_2_0;