Collection text representation

The DataBlade® API supports a collection in text representation as a quoted string with the following format:
"coll_type{elmnt_value, elmnt_value, ...}"
coll_type
The type of the collection: SET, MULTISET, or LIST.
elmnt_value
The text representation of the element value.
A collection in its text representation is often called a collection string. For example, the following collection string provides the text representation for a SET of integer values:
"SET{1, 6, 8, 3}"