class_docstr: path implementation that offers access to (possibly remote) subversion
  repositories. 
docstr: copy path to target with checkin message msg.
code: def copy(self, target, msg="copied by py lib invocation"):
      """copy path to target with checkin message msg."""
      if getattr(target, "rev", None) is not None:
          raise py.error.EINVAL(target, "revisions are immutable")
      self._svncmdexecauth(
          'svn copy -m "%s" "%s" "%s"'
          % (msg, self._escape(self), self._escape(target))
      )
      self._norev_delentry(target.dirpath())
  
imports: import os, sys, time, re
  import py
  from py import path, process
  from py._path import common
  from py._path import svnwc
  from py._path.cacheutil import BuildcostAccessCache, AgingCache
label_desc: Use image node_id 14 for calling the SvnCommandPath obj's underlying member method code with example usage: obj.copy(target, msg) without return types