def pvlan_mapping
      range = config_get('interface', 'pvlan_mapping', name: @name)
      return default_pvlan_mapping if range.nil?
      range.empty? ? range : [range.delete(' ')]
    end
def pvlan_mapping
      range = config_get('interface', 'pvlan_mapping', name: @name)
      return default_pvlan_mapping if range.nil?
      range.empty? ? range : [range.delete(' ')]
    end
--------------------------
 This is an SVI property.
 <state> private-vlan mapping <range>  # ex. range = ['2-4,9']
 Always returns an array.