Derive default maya shelves

Coding
,
1

Is there a command that specifically gets the default maya shelves?
By default shelves, I mean as follows:

'Poly Modeling',
'Sculpting',
'Rigging',
'Animation'

I am trying to find a way to differentiate the ones I created (user shelves) apart from the default ones

2

short demonstration:

maya_window_name = mel.eval('$tmpVar = $gMainWindow;')
shelf_top_level = mel.eval('global string $gShelfTopLevel; $temp = $gShelfTopLevel;')
all_shelfs_tabs_names = cmds.tabLayout(shelf_top_level, query = True, childArray = True)
shelf_tab_name = cmds.tabLayout(shelf_top_level, query = True, selectTab = True)
current_shelf = '{}|{}'.format(shelf_top_level, shelf_tab_name)

buton_name = 'Reload All Textures in Viewport'

cmds.shelfButton(enableCommandRepeat = True,
                          annotation = buton_name,
                               label = buton_name,
                   imageOverlayLabel = 'Reload\nTexture',
                             command = 'cmds.ogs(reloadTextures = True)',
                          sourceType = 'python',
                   flexibleWidthType = 3,
                  flexibleWidthValue = 32,
                              enable = 1,
                               width = 35,
                              height = 34,
                              manage = 1,
                             visible = 1,
                     preventOverride = 0,
                    enableBackground = 0,
                     backgroundColor = (0.0, 0.0, 0.0),
                      highlightColor = (0.321569, 0.521569, 0.65098),
                               align = 'center',
                         labelOffset = 0,
                            rotation = 0,
                               flipX = 0,
                               flipY = 0,
                            useAlpha = 1,
                                font = 'plainLabelFont',
                   overlayLabelColor = (0.0, 1.0, 1.0),
               overlayLabelBackColor = (0.0, 0.0, 0.0, 0.5),
                               image = 'commandButton.png',
                              image1 = 'commandButton.png',
                               style = 'textOnly',
                         marginWidth = 1,
                        marginHeight = 1,
                   commandRepeatable = 1,
                                flat = 1,
                              parent = current_shelf)

print (('\t Creating Button \"{}\" on shelf: \"{}\" - complete.\n'
       ).format(buton_name,  shelf_tab_name))


separator = cmds.separator(parent = current_shelf,
                           enable = 1,
                            width = 12,
                           height = 35,
                           manage = 1,
                          visible = 1,
                  preventOverride = 0,
                 enableBackground = 0,
                  backgroundColor = (0, 0, 0),
                   highlightColor = (0.32, 0.52, 0.65),
                            style = 'shelf',
                       horizontal = 0)

print('\n\t Creating Separator on shelf: \"{}\" - complete.\n'.format(shelf_tab_name))
cmds.saveAllShelves(shelf_top_level)

tabLayout command (Python):