nl_tokens: Internal
pl_tokens: function _deepMerge ( target , source ) { Object . keys ( source ) . forEach ( function ( key ) { if ( target [ key ] !== null && typeof target [ key ] === 'object' && ! Array . isArray ( target [ key ] ) ) { _deepMerge ( target [ key ] , source [ key ] ) ; } else { <mask> [ key ] = source [ key ] ; } } ) ; }