'Load parameters from file.
filename : str
Path to parameter file.
ctx : Context or list of Context
Context(s) initialize loaded parameters on.
allow_missing : bool, default False
Whether to silently skip loading parameters not represents in the file.
ignore_extra : bool, default False
Whether to silently ignore parameters from the file that are not
present in this Block.'

def load_params(self, filename, ctx, allow_missing=False, ignore_extra=False):

    self.collect_params().load(filename, ctx, allow_missing, ignore_extra, self.prefix)
