static final public void report(String msg) {
        System.err.println("SLF4J: " + msg);
    }
See  {@link Reporter} class for alternatives.

@deprecated replaced by one of {@link Reporter#info(String)},
{@link Reporter#warn(String)} or {@link Reporter#error(String)} methods.
@param msg message to print
slf4j-api/src/main/java/org/slf4j/helpers/Util.java