public java.util.Map<String, java.util.List<String>> getSubstitutions() {
        return substitutions;
    }
<p>
A map of the message variables to merge with the variables specified for the default message
(DefaultMessage.Substitutions). The variables specified in this map take precedence over all other variables.
</p>

@return A map of the message variables to merge with the variables specified for the default message
        (DefaultMessage.Substitutions). The variables specified in this map take precedence over all other
        variables.
aws-java-sdk-pinpoint/src/main/java/com/amazonaws/services/pinpoint/model/EndpointSendConfiguration.java