new_contents: from maya import cmds
  from maya import mel
  
  
  commandDict = {}
  
  
  def openAlembic():
      cmds.AlembicOpen()
  commandDict['openAlembic'] = 'commandButton.png'
  
  def referenceAlembic():
      mel.eval("""projectViewer AlembicReference;""")
  commandDict['referenceAlembic'] = 'commandButton.png'
  
  def referenceAlembicOptions():
      cmds.CreateReferenceOptions()
  commandDict['referenceAlembicOptions'] = 'commandButton.png'
  
  def importAlembic():
      cmds.AlembicImport()
  commandDict['importAlembic'] = 'commandButton.png'
  
  def importAlembicOptions():
      cmds.AlembicImportOptions()
  commandDict['importAlembicOptions'] = 'commandButton.png'
  
  def replaceAlembic():
      cmds.AlembicReplace()
  commandDict['replaceAlembic'] = 'commandButton.png'
  
  def exportAllToAlembic():
      cmds.AlembicExportAll()
  commandDict['exportAllToAlembic'] = 'commandButton.png'
  
  def exportAllToAlembicOptions():
      cmds.AlembicExportAllOptions()
  commandDict['exportAllToAlembicOptions'] = 'commandButton.png'
  
  def exportSelectionToAlembic():
      cmds.AlembicExportSelection()
  commandDict['exportSelectionToAlembic'] = 'commandButton.png'
  
  def exportSelectionToAlembicOptions():
      cmds.AlembicExportSelectionOptions()
  commandDict['exportSelectionToAlembicOptions'] = 'commandButton.png'
subject: Add alembic commands