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Constructs a new structure with new values for fields in kwargs.

This is a helper method for working structured objects in a functional manner. This method will create a new structure where the fields named by keys in kwargs replaced with the associated values.

structure The structure with named fields to update.
**kwargs The list of key-value pairs of fields to update in structure.

A new instance of the same type of structure, with the fields named in the keys of **kwargs replaced with the associated values.

KeyError If kwargs contains a field that is not in structure.
TypeError If structure is not a structure with named fields.