Sets the value for the entry with given name.
An up.Params instance can hold multiple entries with the same name.
All existing entries with the given name are deleted before the
new entry is set. To add a new entry even if the name is taken, use up.Params#add().
The name of the entry to set.
The new value of the entry.
Tip Your coding agent can search these docs locally with the Unpoly agent skill