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Description
Apple objc guidelines frown upon using "and" as a parameter-combining word. The second parameter here ought to be just "center":
bodyWithCircleOfRadius:(CGFloat)radius andCenter:(CGPoint)center
Quote: "Don’t use “and” to link keywords that are attributes of the receiver."
https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CodingGuidelines/Articles/NamingMethods.html --