public String getSolutionArn() {
        return this.solutionArn;
    }
<p>
The Amazon Resource Name (ARN) of the solution to list the campaigns for. When a solution is not specified, all
the campaigns associated with the account are listed.
</p>

@return The Amazon Resource Name (ARN) of the solution to list the campaigns for. When a solution is not
        specified, all the campaigns associated with the account are listed.
aws-java-sdk-personalize/src/main/java/com/amazonaws/services/personalize/model/ListCampaignsRequest.java