parameters: (value_name)
docstring: Converts a value_name into the equivalent chart-trace name pair.
  
    Buildbot represents values by the measurement name and an optional trace name,
    whereas telemetry represents values with a chart_name.trace_name convention,
    where chart_name is optional. This convention is also used by chart_json.
  
    This converts from the telemetry convention to the buildbot convention,
    returning a 2-tuple (measurement_name, trace_name).
docstring_summary: Converts a value_name into the equivalent chart-trace name pair.
docstring_tokens: Converts a value_name into the equivalent chart - trace name pair .
function: def _ConvertValueNameToChartAndTraceName(value_name):
    """Converts a value_name into the equivalent chart-trace name pair.
  
    Buildbot represents values by the measurement name and an optional trace name,
    whereas telemetry represents values with a chart_name.trace_name convention,
    where chart_name is optional. This convention is also used by chart_json.
  
    This converts from the telemetry convention to the buildbot convention,
    returning a 2-tuple (measurement_name, trace_name).
    """
    if '.' in value_name:
      return value_name.split('.', 1)
    else:
      return value_name, value_name
function_tokens: def _ConvertValueNameToChartAndTraceName ( value_name ) : if '.' in value_name : return value_name . split ( '.' , 1 ) else : return value_name , value_name