registerConverter(new DoubleNumberConverter(double.class), double.class);
        registerConverter(new FloatNumberConverter(Float.class), Float.class);
        registerConverter(new FloatNumberConverter(float.class), float.class);
        registerConverter(new IntegerNumberConverter(Integer.class), Integer.class);
        registerConverter(new IntegerNumberConverter(int.class), int.class);

Class <org.gradle.internal.typeconversion.DefaultTypeConverter$FloatNumberConverter> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DefaultTypeConverter.java:0)