Extend cleaning test to ensure coverage of cleaning encapsulated empty components
Extend cleaning test to ensure coverage of cleaning encapsulated empty components

cellml/libcellml,nickerso/libcellml,nickerso/libcellml,nickerso/libcellml,cellml/libcellml,hsorby/libcellml,hsorby/libcellml,hsorby/libcellml,cellml/libcellml,hsorby/libcellml,nickerso/libcellml,cellml/libcellml