Example with E4:

@Inject ILog log;

Example with Declarative Services:

@Reference ILog log;

Of course any other way to acquire a Service (ServiceTracker, ServiceCaller, ...) will also work.

There is now a new EclipseContextFactory.getServiceContext(Class<?>) method that could be used to acquire an E4 Service Context containing all OSGi services using a context class. This becomes handy in situations where you neither have an E4 context nor an OSGi context at hand (e.g. E3 legacy code) but still want to inject some fields or create injected objects.

On Windows 10, all the dark theme tweaks including the dark text's search and cancel buttons can be disabled using the org.eclipse.swt.internal.win32.disableCustomThemeTweaks Java property.
For Example: add this VM argument in eclipse.ini or on the command line after -vmargs:

-Dorg.eclipse.swt.internal.win32.disableCustomThemeTweaks=true