         guard data.count == type(of: self).length
             else { return nil }
         
-        guard let beats = BeatsPerMinute(rawValue: data[0])
-            else { return nil }
+        let beats = BeatsPerMinute(rawValue: data[0])
         
         self.init(beats: beats)
     }

    
    public var description: String {
        
        return value.description
    }
    
}

        
        public static var unitType: UnitIdentifier { return .beatsPerMinute }
        
        public var rawValue: UInt8
        
        public init(rawValue value: UInt8) {
            
            self.rawValue = value
        }
        
        fileprivate init(unsafe value: UInt8) {
            
            self.rawValue = value
        }
        
    }
