General: some work on replacing `getXXX()` with `xxx()`.
General: some work on replacing `getXXX()` with `xxx()`.

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