parameters: (dent, is_dir)
return_statement: return '_test.' in dent or dent.startswith('example_')
docstring: Filter function that can be passed to FindCFiles in order to remove
    non-test sources.
docstring_summary: Filter function that can be passed to FindCFiles in order to remove
    non-test sources.
docstring_tokens: Filter function that can be passed to FindCFiles in order to remove non - test sources .
function: def OnlyTests(dent, is_dir):
    """Filter function that can be passed to FindCFiles in order to remove
    non-test sources."""
    if is_dir:
      return dent != 'test'
    return '_test.' in dent or dent.startswith('example_')
function_tokens: def OnlyTests ( dent , is_dir ) : if is_dir : return dent != 'test' return '_test.' in dent or dent . startswith ( 'example_' )