This is purely an implementation detail of SourcePackageRecipe.recipe_data and SourcePackageRecipeBuild.manifest, the classes in this file have no public interfaces.
| Class | InstructionType | The instruction type, for _SourcePackageRecipeDataInstruction.type. |
| Class | SourcePackageRecipeData | The database representation of a BaseRecipeBranch from bzr-builder. |
| Class | _SourcePackageRecipeDataInstruction | A single line from a recipe. |