src/main/java/io/reactivex/plugins/RxJavaPlugins.java
@SuppressWarnings("rawtypes")
    public static void setOnSingleSubscribe(@Nullable BiFunction<? super Single, ? super SingleObserver, ? extends SingleObserver> onSingleSubscribe) {
        if (lockdown) {
            throw new IllegalStateException("Plugins can't be changed anymore");
        }
        RxJavaPlugins.onSingleSubscribe = onSingleSubscribe;
    }
@SuppressWarnings("rawtypes")
    public static void setOnSingleSubscribe(@Nullable BiFunction<? super Single, ? super SingleObserver, ? extends SingleObserver> onSingleSubscribe) {
        if (lockdown) {
            throw new IllegalStateException("Plugins can't be changed anymore");
        }
        RxJavaPlugins.onSingleSubscribe = onSingleSubscribe;
    }
@ SuppressWarnings ( "rawtypes" ) public static void setOnSingleSubscribe ( @ Nullable BiFunction < ? super Single , ? super SingleObserver , ? extends SingleObserver > onSingleSubscribe ) { if ( lockdown ) { throw new IllegalStateException ( "Plugins can't be changed anymore" ) ; } RxJavaPlugins . onSingleSubscribe = onSingleSubscribe ; }
Sets the specific hook function.
@param onSingleSubscribe the hook function to set, null allowed
Sets the specific hook function .