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Methods Method Description io.vertx.mutiny.redis.client.Request.nullArg() REDIS does not supportnullas a parameter, only as response. This was a deviation from the official protocol which should be avoided. Other clients explicitly do not allow this. Adds anullencoded string. Redis does not allow storing thenullvalue by itself. This method will encode any null value as the four character long string"null". As a recommendation, this method should not be used directly unless this is the intented behavior. It is present to handle special cases such as encoding ofJsonObjectandJsonArraywhich may contain null values.