Mark copy of filter_system_libs as private.

delocate/libsana.py

@@ -37,7 +37,7 @@ class DependencyNotFound(Exception):
     """
 
 
-def filter_system_libs(libname):
+def _filter_system_libs(libname):
     # type: (Text) -> bool
     return not (libname.startswith('/usr/lib') or libname.startswith('/System'))
 
@@ -90,7 +90,7 @@ def get_dependencies(
         logger.debug("Ignoring dependencies of %s" % lib_fname)
         return
     if not os.path.isfile(lib_fname):
-        if not filter_system_libs(lib_fname):
+        if not _filter_system_libs(lib_fname):
             logger.debug(
                 "Ignoring missing library %s because it is a system library.",
                 lib_fname
@@ -110,7 +110,7 @@ def get_dependencies(
             else:
                 dependency_path = search_environment_for_lib(install_name)
             if not os.path.isfile(dependency_path):
-                if not filter_system_libs(dependency_path):
+                if not _filter_system_libs(dependency_path):
                     logger.debug(
                         "Skipped missing dependency %s"
                         " because it is a system library.",