core-android/src/main/java/com/uber/sdk/android/core/auth/AuthUtils.java
@NonNull
    public static String scopeCollectionToString(@NonNull Collection<Scope> scopes) {
        Set<String> stringSet = scopeCollectionToStringSet(scopes);
        return TextUtils.join(" ", stringSet).toLowerCase();
    }
@NonNull
    public static String scopeCollectionToString(@NonNull Collection<Scope> scopes) {
        Set<String> stringSet = scopeCollectionToStringSet(scopes);
        return TextUtils.join(" ", stringSet).toLowerCase();
    }
@ NonNull public static String scopeCollectionToString ( @ NonNull Collection < Scope > scopes ) { Set < String > stringSet = scopeCollectionToStringSet ( scopes ) ; return TextUtils . join ( " " , stringSet ) . toLowerCase ( ) ; }
Converts a {@link Collection} of {@link Scope}s into a space-delimited {@link String}.

@param scopes the {@link Collection} of {@link Scope}s to convert
@return a space-delimited {@link String} of {@link Scope}s
Converts a { @link Collection } of { @link Scope } s into a space - delimited { @link String } .