Only one call to a TV_ttf_display_type will be attempted per object to be displayed, even if multiple candidates are defined. For a type T, TotalView will look for the function in this order:
1. A class-qualified class (static) function returning int and taking a single const T * as its only argument.
2. A function at file scope, returning int and taking a single const T * as its only argument.
3. A global function, returning int and taking a single const T * as its only argument.
4. A TCL transformation
Namespace qualifications are not directly considered.