public Tag withValue(String value) {
        setValue(value);
        return this;
    }
<p>
An optional string, typically used to describe or define the tag. Valid characters include Unicode letters,
digits, white space, _, ., /, =, +, -, %, and @.
</p>

@param value
       An optional string, typically used to describe or define the tag. Valid characters include Unicode
       letters, digits, white space, _, ., /, =, +, -, %, and @.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-machinelearning/src/main/java/com/amazonaws/services/machinelearning/model/Tag.java