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package org.slf4j.spi;

import java.util.function.Supplier;

import org.slf4j.Marker;
import org.slf4j.event.Level;

/**
 * 
A no-operation implementation of {@link LoggingEventBuilder}.

 *
 * 
As the name indicates, the method in this class do nothing, except when a return value is expected
 * in which case a singleton, i.e. the unique instance of this class is returned.
 * 
Returns the singleton instance of this class.
     * Used by {@link org.slf4j.Logger#makeLoggingEventBuilder(Level) makeLoggingEventBuilder(Level)}.

     *
     * @return the singleton instance of this class
     */
    public static LoggingEventBuilder singleton() {
        return SINGLETON;
    }

    @Override
    public LoggingEventBuilder addMarker(Marker marker) {
        return singleton();
    }

    @Override
    public LoggingEventBuilder addArgument(Object p) {
        return singleton();
    }

    @Override
    public LoggingEventBuilder addArgument(Supplier objectSupplier) {
        return singleton();
    }

    @Override
    public LoggingEventBuilder addKeyValue(String key, Object value) {
        return singleton();
    }

    @Override
    public LoggingEventBuilder addKeyValue(String key, Supplier value) {
        return singleton();
    }

    @Override
    public LoggingEventBuilder setCause(Throwable cause) {
        return singleton();
    }

    @Override
    public void log() {
    }

    @Override
    public LoggingEventBuilder setMessage(String message) {
        return this;
    }
    @Override
    public LoggingEventBuilder setMessage(Supplier messageSupplier) {
        return this;
    }

    @Override
    public void log(String message) {
    }

    @Override
    public void log(Supplier messageSupplier) {
    }

    @Override
    public void log(String message, Object arg) {
    }

    @Override
    public void log(String message, Object arg0, Object arg1) {
    }

    @Override
    public void log(String message, Object... args) {

    }

}
    

    

    

            

    

            



    
    






    
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