Returns the value function object identified by the name.
Original signature is '+ (id)functionWithName:(NSString *)name'
Available in Mac OS X v10.6 and later.


- name (NSString)
- The name of the value function.

A new CAValueFunction instance with the value function specified by the name.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later)