'Read the decrypted and uncompressed data after the file header.
For example, in KDB4 this would be plain, utf-8 xml.
Note that this is the source data for the lxml.objectify element tree
at `self.obj_root`. Any changes made to the parsed element tree will
NOT be reflected in that data stream! Use `self.pretty_print` to get
XML output from the element tree.'

def read(self, n=(-1)):

    if self.in_buffer:
        return self.in_buffer.read(n)
