Search, open and install extensions by commands

In VSCode there are a bunch of commands to deal with extensions. In my extension, I'm offering to install some other extensions, which is not a strict dependency. I'm using commands:

• workbench.extensions.search - just opens extensions view and search for passed value
• extension.open - opens extension
• workbench.extensions.installExtension - installs extension

Is there any way how I can replace those commands for Theia?