public String getNamespace() {
        return this.namespace;
    }
<p>
The name of the metric namespace for this filter.
</p>
<p>
The namespace can contain only ASCII printable characters (ASCII range 32 through 126). It must contain at least
one non-whitespace character.
</p>

@return The name of the metric namespace for this filter.</p>
        <p>
        The namespace can contain only ASCII printable characters (ASCII range 32 through 126). It must contain
        at least one non-whitespace character.
aws-java-sdk-cloudwatch/src/main/java/com/amazonaws/services/cloudwatch/model/MetricStreamFilter.java