Replace getOrThrow with getNonNullOrThrow

Author: scordio

junit-platform-commons/src/main/java/org/junit/platform/commons/support/conversion/ConversionException.java

@@ -15,6 +15,7 @@
 import java.io.Serial;
 
 import org.apiguardian.api.API;
+import org.jspecify.annotations.Nullable;
 import org.junit.platform.commons.JUnitException;
 
 /**
@@ -33,7 +34,7 @@ public ConversionException(String message) {
 		super(message);
 	}
 
-	public ConversionException(String message, Throwable cause) {
+	public ConversionException(String message, @Nullable Throwable cause) {
 		super(message, cause);
 	}
 

junit-platform-commons/src/main/java/org/junit/platform/commons/support/conversion/StringToClassConverter.java

@@ -22,11 +22,11 @@ public boolean canConvert(ConversionContext context) {
 	}
 
 	@Override
-	public @Nullable Class<?> convert(@Nullable String className, ConversionContext context) {
+	public Class<?> convert(@Nullable String className, ConversionContext context) {
 		Preconditions.notNull(className, "className cannot be null");
 		// @formatter:off
 		return ReflectionSupport.tryToLoadClass(className, context.classLoader())
-				.getOrThrow(cause -> new ConversionException(
+				.getNonNullOrThrow(cause -> new ConversionException(
 						"Failed to convert String \"" + className + "\" to type java.lang.Class", cause));
 		// @formatter:on
 	}