你可以查看jenkins-instance的jobDSL-API-Viewer，它会显示你的示例中所有可用的jodDSL函数（jobDSL用于已安装的插件）：
https://your.jenkins.url/plugin/job-dsl/api-viewer/index.html

这是我使用的（用organizationFolder Package 的bitbucket）：

organizationFolder('example') {
    description('This contains branch source jobs for Bitbucket')
    displayName('The Organization Folder')
    triggers {
        periodic(86400)
    }
    organizations {
        bitbucket {
          repoOwner('myorg')
          credentialsId('BITBUCKET_CRED')
          autoRegisterHooks(false)
          traits {
            sourceRegexFilter {
              // A Java regular expression to restrict the project names.
              regex('.*')
            }
          }
        }
    }
    properties {
        mavenConfigFolderOverrideProperty {
            override(true)
            settings {
                settingsConfigId('DEFAULT_MAVEN_SETTINGS')
            }
        }
    }
    // discover Branches (workaround due to JENKINS-46202)
    configure { node ->
        // node represents <jenkins.branch.OrganizationFolder>        
        def traits = node / 'navigators' / 'com.cloudbees.jenkins.plugins.bitbucket.BitbucketSCMNavigator' / 'traits'
        traits << 'com.cloudbees.jenkins.plugins.bitbucket.BranchDiscoveryTrait' {
            strategyId(3) // detect all branches
        }
    }    
}

multibranchPipelineJob('example'){
    branchSources{
      branchSource{
        source{
          bitbucket{
            repoOwner(project)
            repository(name)
            credentialsId('git_user')
            traits {
              bitbucketBranchDiscovery{
                strategyId(1)
              }
            }            
          }
        }
      }
    }

其中traits在DSL文档中定义，strategyId的正确值我在bitbucket插件源代码中找到。
从这里一定很容易发现其他的选择。

我认为@prumand提供了最好的方式来调查工作dsl，下面我从我的Angular 添加示例单个repo多分支管道：

multibranchPipelineJob('/myjob') {

        factory {
            workflowBranchProjectFactory {
                scriptPath('Jenkinsfile')
            }
        }

        branchSources {
          branchSource {
            source {
              bitbucket {
               id('123456789')
               serverUrl('https://bitbucket.org')
               credentialsId('bitbucket-access-id')
               repoOwner('myGroupOrUser')
               repository('myRepository')
               autoRegisterHook(true) // or not

                traits {
                  bitbucketBranchDiscovery {
                    strategyId(3) // 1 - exclude branches that are also filled as PRs, 3 - all branches
                  }
                  bitbucketPullRequestDiscovery {
                    strategyId(1) // 1 - merging PR with the current target branch revision, 2 - current pull request revision
                  }
                }
              }
            }
          }
        }

        orphanedItemStrategy {
          discardOldItems {
            numToKeep(3)
          }
        }

        triggers {
          periodicFolderTrigger {
            interval('86400000') // 1 day
          }
        }

      }