'Return the repository\'s tool dependencies that have been uninstalled.'

@property
def uninstalled_tool_dependencies(self):

    uninstalled_tool_dependencies = []
    for tool_dependency in self.tool_dependencies:
        if (tool_dependency.status == ToolDependency.installation_status.UNINSTALLED):
            uninstalled_tool_dependencies.append(tool_dependency)
    return uninstalled_tool_dependencies
