def current_impressbox_provisioner
      @env.vagrantfile.config.vm.provisioners.each do |provisioner|
        next unless provisioner.type == :impressbox
        return provisioner
      end
      nil
    end
def current_impressbox_provisioner
      @env.vagrantfile.config.vm.provisioners.each do |provisioner|
        next unless provisioner.type == :impressbox
        return provisioner
      end
      nil
    end
Gets current provisioner with impressbox type

@return [::VagrantPlugins::Kernel_V2::VagrantConfigProvisioner,nil]