Tree layout doesn't support nested parallel stages

[stuartrowe]

Jenkins and plugins versions report

Environment

Jenkins: 2.361.4
OS: Windows 11 - 10.0
Java: 11.0.17 - Eclipse Adoptium (OpenJDK 64-Bit Server VM)
---
ace-editor:1.1
apache-httpcomponents-client-4-api:4.5.13-138.v4e7d9a_7b_a_e61
bouncycastle-api:2.26
branch-api:2.1051.v9985666b_f6cc
caffeine-api:2.9.3-65.v6a_47d0f4d1fe
cloudbees-folder:6.758.vfd75d09eea_a_1
command-launcher:1.2
credentials:1189.vf61b_a_5e2f62e
credentials-binding:523.vd859a_4b_122e6
dark-theme:262.v0202a_4c8fb_6a
display-url-api:2.3.6
durable-task:500.v8927d9fd99d8
git:4.14.1
git-client:3.13.0
github:1.34.3
github-api:1.303-400.v35c2d8258028
github-branch-source:1696.v3a_7603564d04
instance-identity:116.vf8f487400980
ionicons-api:31.v4757b_6987003
jackson2-api:2.13.4.20221013-295.v8e29ea_354141
jakarta-activation-api:2.0.1-2
jakarta-mail-api:2.0.1-2
javax-activation-api:1.2.0-5
javax-mail-api:1.6.2-5
jaxb:2.3.7-1
jdk-tool:1.0
jjwt-api:0.11.5-77.v646c772fddb_0
jsch:0.1.55.61.va_e9ee26616e7
mailer:438.v02c7f0a_12fa_4
metrics:4.2.10-405.v60a_9cc74e923
okhttp-api:4.9.3-108.v0feda04578cf
pipeline-graph-analysis:195.v5812d95a_a_2f9
pipeline-graph-view:999999-SNAPSHOT (private-1abdd280-stuartr)
pipeline-groovy-lib:621.vb_44ce045b_582
pipeline-input-step:466.v6d0a_5df34f81
pipeline-model-api:2.2118.v31fd5b_9944b_5
pipeline-model-definition:2.2118.v31fd5b_9944b_5
pipeline-model-extensions:2.2118.v31fd5b_9944b_5
pipeline-stage-step:296.v5f6908f017a_5
pipeline-stage-tags-metadata:2.2118.v31fd5b_9944b_5
plain-credentials:139.ved2b_9cf7587b
scm-api:621.vda_a_b_055e58f7
script-security:1218.v39ca_7f7ed0a_c
snakeyaml-api:1.33-90.v80dcb_3814d35
ssh-credentials:305.v8f4381501156
sshd:3.236.ved5e1b_cb_50b_2
structs:324.va_f5d6774f3a_d
theme-manager:1.5
token-macro:321.vd7cc1f2a_52c8
trilead-api:2.84.v72119de229b_7
variant:59.vf075fe829ccb
workflow-api:1200.v8005c684b_a_c6
workflow-basic-steps:994.vd57e3ca_46d24
workflow-cps:3536.vb_8a_6628079d5
workflow-durable-task-step:1217.v38306d8fa_b_5c
workflow-job:1254.v3f64639b_11dd
workflow-multibranch:716.vc692a_e52371b_
workflow-scm-step:400.v6b_89a_1317c9a_
workflow-step-api:639.v6eca_cd8c04a_a_
workflow-support:839.v35e2736cfd5c

What Operating System are you using (both controller, and any agents involved in the problem)?

OS: Windows 11 - 10.0

Reproduction steps

This issue can be reproduced with the example pipeline below:

node {
    parallel([
        "A": {
            stage("Build") {
                echo("Build A")
            }
            stage("Test") {
                parallel([
                    "A1" : {
                       echo("Test A1")
                    },
                    "A2" : {
                       echo("Test A2")
                    }
                ])
            }
        },
        "B": {
            stage("Build") {
                echo("Build B")
            }
            stage("Test") {
                parallel([
                    "B1" : {
                       echo("Test B1")
                    },
                    "B2" : {
                       echo("Test B2")
                    }
                ])
            }
        }
    ])
}

Expected Results

The parallel branches for A1, A2 and B1, B2 should be nested under the Test stage of the parent A and B branches respectively. The pipeline steps view provided by the Pipeline: Supporting APIs Plugin correctly handles this:

Actual Results

The nested parallel branches are incorrectly shown as siblings of their parent parallel branch:

Anything else?

May be similar / duplicate of #51, but I believe that was created before the move to the tree layout and doesn't include the pipeline console view issue.

[timbrown5]

I think this is related to #51 as the tree view uses the graph view as a basis.