Select a part of the text in a combobox

is there a way to select a part of the text in a combobox?

for example:

if you have items like:
“Peter ”
“Thomas ”

in your combobox.
And after you selected “Peter ” i want to preselect/focus the “” part so you can enter the name of peter.

something like Textfield(setSelectionRange) but only for comboboxes

hope you understand my problem :smiley:

edit: on the added image you can see what i mean