 	
 	/// Creates the data to request creation of a new environment
 	func createEnvironment(transactionId: String) throws -> Data {
-		return try encoder.encode(GenericCommand(msg: "createEnvironment", argument: transactionId))
+		try encoder.encode(GenericCommand(msg: "createEnvironment", argument: transactionId))
 	}
 	
 	/// Returns the message data to clear the specified environment
 	///
 	/// - Parameter id: the id of the environment
 	func clearEnvironment(id: Int) throws -> Data {
-		return try encoder.encode(ClearEnvironmentCommand(contextId: id))
+		try encoder.encode(ClearEnvironmentCommand(contextId: id))
 	}
 	/// Create the data to request help for a topic
 	///

	/// - Parameter deltaOnly: Should it return only changed values, or all values
	/// - Returns: data to send to compute server
	func listVariables(deltaOnly: Bool, contextId: Int?) throws -> Data {
		return try encoder.encode(ListVariableCommand(delta: deltaOnly, contextId: contextId))
	}
	
	/// Create the data to open a connection to the compute server

	///
	/// - Returns: data to send to compute server
	func saveEnvironment() throws -> Data {
		try encoder.encode(GenericCommand(msg: "saveEnv", argument: ""))
	}
	
	/// Create the data to execute a query
