How to get a list of installable errata for content hosts from a particular lifecycle environment in Red Hat Satellite 6.3 using API?

Issue

• How to pull list of installable errata for all content hosts from a particular lifecycle environment using API?
• How can we extract the list of errata which can be viewed from the following path on Red Hat Satellite GUI?
  • On Satelltie GUI click on --> Hosts --> Content Host --> apply filter (lifecycle_environment=environemt) in the search box --> Select all hosts --> Click Select Action --> Manage Errata.