public void setIsSigned(Boolean isSigned) {
        this.isSigned = isSigned;
    }
<p>
A value that indicates whether an integer column is signed.
</p>

@param isSigned
       A value that indicates whether an integer column is signed.
aws-java-sdk-rdsdata/src/main/java/com/amazonaws/services/rdsdata/model/ColumnMetadata.java