public ListLakeFormationOptInsRequest withPrincipal(DataLakePrincipal principal) {
        setPrincipal(principal);
        return this;
    }
@param principal
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-lakeformation/src/main/java/com/amazonaws/services/lakeformation/model/ListLakeFormationOptInsRequest.java