added a mechanism to bypass inference

core/src/main/resources/lib/form/property.jelly

-<!--
-The MIT License
-
-Copyright (c) 2010, CollabNet
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
--->
-
-<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
-  <st:documentation>
-    Renders inline a single-value nested data-bound property of the current instance.
-    This is useful when your object composes another data-bound object as a nested object,
-    yet your UI would still like to render it
-
-    <st:attribute name="field" use="required" />
-  </st:documentation>
-  <f:rowSet name="${field}">
-    <j:set var="descriptor" value="${app.getDescriptorOrDie(descriptor.getPropertyType(instance,field).clazz)}" />
-    <j:set var="instance" value="${instance[field]}"/>
-    <st:include from="${descriptor}" page="${descriptor.configPage}" />
-  </f:rowSet>
+<!--
+The MIT License
+
+Copyright (c) 2010, CollabNet
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+-->
+
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
+  <st:documentation>
+    Renders inline a single-value nested data-bound property of the current instance.
+    This is useful when your object composes another data-bound object as a nested object,
+    yet your UI would still like to render it
+
+    <st:attribute name="field" use="required" />
+    <st:attribute name="propertyDescriptor">
+      If specified, bypass the item descriptor inference and use this instead.
+    </st:attribute>
+  </st:documentation>
+  <f:rowSet name="${field}">
+    <j:set var="descriptor" value="${attrs.propertyDescriptor ?: app.getDescriptorOrDie(descriptor.getPropertyType(instance,field).clazz)}" />
+    <j:set var="instance" value="${instance[field]}"/>
+    <st:include from="${descriptor}" page="${descriptor.configPage}" />
+  </f:rowSet>
 </j:jelly>
\ No newline at end of file