Loading multiple keys from property file

Hello Mule guru's, got a question for you, say I have a property file with a lot of data (100 rows)

Ex data:

lookup.one=testing1

lookup.two=testing2

I know how to get back the value of one of lines, just call it via ${lookup.one}, however, how I want to retrieve all of the lines in a property file, how do I do that? I want to be able to iterate through each line and put them into an object store.