What is the difference between setProperty and setColumnProperty?

I couldn't help noticing this in the code examples -

obj.setProperty("column/count", 5);

and

obj.setColumnProperty("count", 4);
obj.setRowProperty("count", 5);

If column and row properties can be set thru calls to setProperty, why bother with the functions setColumnProperty and setRowProperty?

I guess, using setproperty method, you can dynamically set either a row or a column property. It may not be useful often though.