the name in the step definition to search for. This is combined with the identifier prefix / suffix
to create a replaceable token that signals this parameter for example
"My name is {string}" so the name would be "string".
the regex pattern that can parse the step string
For example:
Template: "My name is {string}"
Step: "My name is 'Jon'"
Regex: "'|"'|\""
The above regex would pull out the word "Jon" from the step