lib/api/deprecate.js
function logNotice(book, key, message) {
    if (logged[key] || disabled[key]) return;

    logged[key] = true;

    var logger = book.getLogger();
    logger.warn.ln(message);
}
function logNotice(book, key, message) {
    if (logged[key] || disabled[key]) return;

    logged[key] = true;

    var logger = book.getLogger();
    logger.warn.ln(message);
}
function logNotice ( book , key , message ) { if ( logged [ key ] || disabled [ key ] ) return ; logged [ key ] = true ; var logger = book . getLogger ( ) ; logger . warn . ln ( message ) ; }
Log a deprecated notice

@param {Book|Output} book
@param {String} key
@param {String} message
Log a deprecated notice