public PushNotificationTemplateResponse withDefaultSubstitutions(String defaultSubstitutions) {
        setDefaultSubstitutions(defaultSubstitutions);
        return this;
    }
<p>
The JSON object that specifies the default values that are used for message variables in the message template.
This object is a set of key-value pairs. Each key defines a message variable in the template. The corresponding
value defines the default value for that variable.
</p>

@param defaultSubstitutions
       The JSON object that specifies the default values that are used for message variables in the message
       template. This object is a set of key-value pairs. Each key defines a message variable in the template.
       The corresponding value defines the default value for that variable.
@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/PushNotificationTemplateResponse.java