Return the base name for a placeholder of *ph_type* in this shape
        collection. There is some variance between slide types, for example
        a notes slide uses a different name for the body placeholder, so this
        method can be overriden by subclasses.

def ph_basename(self, ph_type):
        """
        Return the base name for a placeholder of *ph_type* in this shape
        collection. There is some variance between slide types, for example
        a notes slide uses a different name for the body placeholder, so this
        method can be overriden by subclasses.
        """
        return {
            PP_PLACEHOLDER.BITMAP:       'ClipArt Placeholder',
            PP_PLACEHOLDER.BODY:         'Text Placeholder',
            PP_PLACEHOLDER.CENTER_TITLE: 'Title',
            PP_PLACEHOLDER.CHART:        'Chart Placeholder',
            PP_PLACEHOLDER.DATE:         'Date Placeholder',
            PP_PLACEHOLDER.FOOTER:       'Footer Placeholder',
            PP_PLACEHOLDER.HEADER:       'Header Placeholder',
            PP_PLACEHOLDER.MEDIA_CLIP:   'Media Placeholder',
            PP_PLACEHOLDER.OBJECT:       'Content Placeholder',
            PP_PLACEHOLDER.ORG_CHART:    'SmartArt Placeholder',
            PP_PLACEHOLDER.PICTURE:      'Picture Placeholder',
            PP_PLACEHOLDER.SLIDE_NUMBER: 'Slide Number Placeholder',
            PP_PLACEHOLDER.SUBTITLE:     'Subtitle',
            PP_PLACEHOLDER.TABLE:        'Table Placeholder',
            PP_PLACEHOLDER.TITLE:        'Title',
        }[ph_type]