[2111] Improve stakeholder creation tool

Bug: #2111
Signed-off-by: Guillaume Coutable <guillaume.coutable@obeo.fr>

Author: gcoutable

CHANGELOG.adoc

@@ -43,6 +43,7 @@ On `Requirement` or `Concern` (either definition or usage) graphical nodes it is
 Stakeholders are by default represented with a dedicated graphical node connected to the parent graphical node, or can appear inside the `stakeholders` list compartment.
 - [releng] Fix the license and URL of our maven modules in the SBOM
 - https://github.com/eclipse-syson/syson/issues/2108[#2108] [diagrams] Leverage the latest change of the selection dialog to allow creating an `Actor` graphical node without specialization.
+- https://github.com/eclipse-syson/syson/issues/2111[#2111] [diagrams] Leverage the latest change of the selection dialog to allow creating a `Stakeholder` graphical node without specialization.
 
 === New features
 

backend/application/syson-application/src/test/java/org/eclipse/syson/application/controllers/diagrams/general/view/GVSubNodeAnalysisCreationTests.java

@@ -710,7 +710,7 @@ private void createActorWithSubsettingInCaseUsage(EClass caseUsageSubclass, Stri
             assertThat(referencedObject).isInstanceOf(List.class)
                     .asInstanceOf(type(List.class))
                     .satisfies(actors -> {
-                        assertThat(actors).size().isEqualTo(1);
+                        assertThat((List<?>) actors).size().isEqualTo(1);
                         assertThat(actors.getFirst())
                                 .isInstanceOf(PartUsage.class)
                                 .asInstanceOf(type(PartUsage.class))
@@ -763,7 +763,7 @@ private void createActorWithFeatureTypingInCaseUsage(EClass caseUsageSubclass, S
             assertThat(referencedObject).isInstanceOf(List.class)
                     .asInstanceOf(type(List.class))
                     .satisfies(actors -> {
-                        assertThat(actors).size().isEqualTo(1);
+                        assertThat((List<?>) actors).size().isEqualTo(1);
                         assertThat(actors.getFirst())
                                 .isInstanceOf(PartUsage.class)
                                 .asInstanceOf(type(PartUsage.class))
@@ -815,7 +815,7 @@ private void createActorWithoutSpecializationInCaseUsage(EClass caseUsageSubclas
             assertThat(referencedObject).isInstanceOf(List.class)
                     .asInstanceOf(type(List.class))
                     .satisfies(actors -> {
-                        assertThat(actors).size().isEqualTo(1);
+                        assertThat((List<?>) actors).size().isEqualTo(1);
                         assertThat(actors.getFirst())
                                 .isInstanceOf(PartUsage.class)
                                 .asInstanceOf(type(PartUsage.class))