multiple values in multiple lines for one property?

[Stephan Bulheller]

in rfc 2445 (https://www.ietf.org/rfc/rfc2445.txt) paragraph 4.1.2 (Multiple Values) is written:

The general rule for encoding multi-valued items is to simply
create a new content line for each value, including the property
name.

but it is not possible to parse multi-valued items in multiple lines, because the function storeParam() (ical.js) writes each line as key/value and a second line with the same property name overwrites the first one.

is there a possibility to change this behavior?