#NEWLINE# def __init__( self , names = None ) : #NEWLINE# #INDENT# 'Initializes the source type object.\n\n    Args:\n      names: optional list of artifact definition names. The default is None.\n\n    Raises:\n      FormatError: when artifact names is not set.\n    ' #NEWLINE# if ( not names ) : #NEWLINE# #INDENT# raise errors . FormatError ( 'Missing names value.' ) #NEWLINE# #UNINDENT# super ( ArtifactGroupSourceType , self ) . __init__ ( ) #NEWLINE# self . names = names