77     def __init__(self):  argument
83     def ReadFromPayload(self, payload_file, hasher=None):  argument
119   def __init__(self, payload_file, payload_file_offset=0):  argument
155   def is_incremental(self):  argument
159   def is_partial(self):  argument
163   def total_data_length(self):  argument
176   def _ReadHeader(self):  argument
189   def _ReadManifest(self):  argument
204   def _ReadMetadataSignature(self):  argument
222   def ReadDataBlob(self, offset, length):  argument
239   def Init(self):  argument
280   def _AssertInit(self):  argument
285   def ResetFile(self):  argument
289   def IsDelta(self):  argument
295   def IsFull(self):  argument
299   def Check(self, pubkey_file_name=None, metadata_sig_file=None,  argument
331   def CheckDataHash(self):  argument