nl_tokens: set setting key with val ( merged if already exists and is plain object {} )
pl_tokens: function set ( k , v ) { let curr = get ( k ) if ( curr && _ . isPlainObject ( curr ) && _ . isPlainObject ( v ) ) v = _ . mcopy ( curr , v ) if ( k ) _ . <mask> ( _SETTINGS , k , v ) if ( ! k ) _SETTINGS = v return get ( k ) }