public Map<String,String> data() {
        return this.data == null ? Map.of() : this.data;
    }
@return Data contains the configuration data. Each key must consist of alphanumeric characters, &#39;-&#39;, &#39;_&#39; or &#39;.&#39;. Values with non-UTF-8 byte sequences must use the BinaryData field. The keys stored in Data must not overlap with the keys in the BinaryData field, this is enforced during validation process.
sdk/java/src/main/java/com/pulumi/kubernetes/core/v1/outputs/ConfigMap.java