public EmailMessage withSubstitutions(java.util.Map<String, java.util.List<String>> substitutions) {
        setSubstitutions(substitutions);
        return this;
    }
<p>
The default message variables to use in the email message. You can override the default variables with individual
address variables.
</p>

@param substitutions
       The default message variables to use in the email message. You can override the default variables with
       individual address variables.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-pinpoint/src/main/java/com/amazonaws/services/pinpoint/model/EmailMessage.java