DSL builder for constructing a set of identifiers used by list-based strategies.
Provides multiple ways to add identifiers:
Unary plus operator: +"identifier"
+"identifier"
add function: add("identifier")
add("identifier")
addAll function: addAll("id1", "id2", "id3")
addAll("id1", "id2", "id3")
Adds an identifier to the list.
Adds multiple identifiers to the list.
Adds this string as an identifier to the list.