Document behavior of absent Splunk sourcetype in Custom Destinations

.generator/schemas/v2/openapi.yaml

@@ -18293,7 +18293,7 @@ components:
           description: |-
             The Splunk sourcetype for the events sent to this Splunk destination.
 
-            If absent, the default sourcetype `_json` is used. If set to null, the `sourcetype`
+            If not defined and not already set, the default sourcetype `_json` is used. Otherwise, the previously set value remains unchanged. If set to null, the `sourcetype`
             field is omitted from the Splunk HEC payload entirely. Otherwise, the provided string
             value is used as the sourcetype.
           example: my-source
@@ -18578,7 +18578,7 @@ components:
           description: |-
             The Splunk sourcetype for the events sent to this Splunk destination.
 
-            If absent, the default sourcetype `_json` is used. If set to null, the `sourcetype`
+            If not defined and not already set, the default sourcetype `_json` is used. Otherwise, the previously set value remains unchanged. If set to null, the `sourcetype`
             field is omitted from the Splunk HEC payload entirely. Otherwise, the provided string
             value is used as the sourcetype.
           example: my-source

services/logs_custom_destinations/src/v2/models/CustomDestinationForwardDestinationSplunk.ts

@@ -18,7 +18,7 @@ export class CustomDestinationForwardDestinationSplunk {
   /**
    * The Splunk sourcetype for the events sent to this Splunk destination.
    *
-   * If absent, the default sourcetype `_json` is used. If set to null, the `sourcetype`
+   * If not defined and not already set, the default sourcetype `_json` is used. Otherwise, the previously set value remains unchanged. If set to null, the `sourcetype`
    * field is omitted from the Splunk HEC payload entirely. Otherwise, the provided string
    * value is used as the sourcetype.
    */

services/logs_custom_destinations/src/v2/models/CustomDestinationResponseForwardDestinationSplunk.ts

@@ -14,7 +14,7 @@ export class CustomDestinationResponseForwardDestinationSplunk {
   /**
    * The Splunk sourcetype for the events sent to this Splunk destination.
    *
-   * If absent, the default sourcetype `_json` is used. If set to null, the `sourcetype`
+   * If not defined and not already set, the default sourcetype `_json` is used. Otherwise, the previously set value remains unchanged. If set to null, the `sourcetype`
    * field is omitted from the Splunk HEC payload entirely. Otherwise, the provided string
    * value is used as the sourcetype.
    */