public PutEnvironmentBlueprintConfigurationRequest addRegionalParametersEntry(String key, java.util.Map<String, String> value) {
        if (null == this.regionalParameters) {
            this.regionalParameters = new java.util.HashMap<String, java.util.Map<String, String>>();
        }
        if (this.regionalParameters.containsKey(key))
            throw new IllegalArgumentException("Duplicated keys (" + key.toString() + ") are provided.");
        this.regionalParameters.put(key, value);
        return this;
    }
Add a single RegionalParameters entry

@see PutEnvironmentBlueprintConfigurationRequest#withRegionalParameters
@returns a reference to this object so that method calls can be chained together.
aws-java-sdk-datazoneexternal/src/main/java/com/amazonaws/services/datazone/model/PutEnvironmentBlueprintConfigurationRequest.java