void removeFactMappingByIndex(int index) {
        factMappings.remove(index);
    }
@Test
    public void removeFactMappingByIndex() {
        modelDescriptor.addFactMapping(factIdentifier, expressionIdentifier);
        
        modelDescriptor.removeFactMappingByIndex(0);
        
        assertThatExceptionOfType(IndexOutOfBoundsException.class).isThrownBy(() -> modelDescriptor.getFactMappingByIndex(0));
    }