# AssembliesMixin
Auto-generated from the @jbrowse/mobx-state-tree model in the source — see the [developer guide](https://jbrowse.org/jb2/docs/developer_guide/) for concepts. Built into JBrowse core. [View source](https://github.com/GMOD/jbrowse-components/blob/main/packages/app-core/src/Assemblies/AssembliesMixin.ts).
Adds `sessionAssemblies` (admin-aware, persisted-with-session assemblies) and
`temporaryAssemblies` (used for ad-hoc read-vs-ref style assemblies).
## Properties
| Member | Description |
| --- | --- |
| **sessionAssemblies**
sessionAssemblies: types.stripDefault( types.array(assemblyConfigSchemasType), [], ) | |
| **temporaryAssemblies**
temporaryAssemblies: types.stripDefault( types.array(assemblyConfigSchemasType), [], ) | |
## Getters
| Member | Description |
| --- | --- |
| **assemblies**
(ConfigNodeProps<…> & ConfigNodeActions & ConfigNodeBrand<ConfigurationSchemaType<…>>)[] | sessionAssemblies plus jbrowse config assemblies. Does not include temporaryAssemblies; this is the list shown in the AssemblySelector dropdown. |
| **assemblyNames**
string[] | names of the assemblies returned by the `assemblies` getter |
## Methods
| Member | Description |
| --- | --- |
| **findAssemblyConf**
(name: string) => (ConfigNodeProps<…> & ConfigNodeActions & ConfigNodeBrand<ConfigurationSchemaType<…>>) | undefined | The assembly config answering to `name`, as its name or one of its aliases, from any of the three arrays the assemblyManager draws on, or undefined.
One namespace, because `name` is the assembly config's MST identifier: a second config carrying a name one of the others already has doesn't fail at the add, it makes every `assembly.configuration` safeReference in the manager ambiguous, and MST then throws on every read of one — inside the manager's own autorun and inside `assemblyNameMap`, which takes the session down. So each add path checks all three, not just the array it pushes to. Aliases count too: a new assembly named `GRCh38` beside an `hg38` aliased `GRCh38` would leave `get('GRCh38')` to array order. |
## Actions
| Member | Description |
| --- | --- |
| **addSessionAssembly**
(conf: AnyConfiguration) => ConfigNodeProps<…> & ConfigNodeActions & ConfigNodeBrand<ConfigurationSchemaType<…>> | |
| **addAssembly**
(conf: AnyConfiguration) => void | |
| **removeAssembly**
(name: string) => void | |
| **removeSessionAssembly**
(assemblyName: string) => void | |
| **addTemporaryAssembly**
(conf: AnyConfiguration) => ConfigNodeProps<…> & ConfigNodeActions & ConfigNodeBrand<ConfigurationSchemaType<…>> | used for read vs ref type assemblies. |
| **removeTemporaryAssembly**
(name: string) => void | |