def __init__(self, config_service):
    'Constructor for ChartService.\n\n    Args:\n      config_service (ConfigService): An instance of ConfigService.\n    '
    self.config_service = config_service
    self.issuesnapshot_tbl = sql.SQLTableManager(ISSUESNAPSHOT_TABLE_NAME)
    self.issuesnapshot2cc_tbl = sql.SQLTableManager(ISSUESNAPSHOT2CC_TABLE_NAME)
    self.issuesnapshot2component_tbl = sql.SQLTableManager(ISSUESNAPSHOT2COMPONENT_TABLE_NAME)
    self.issuesnapshot2label_tbl = sql.SQLTableManager(ISSUESNAPSHOT2LABEL_TABLE_NAME)
Constructor for ChartService.

Args:
  config_service (ConfigService): An instance of ConfigService.
def __init__(self, config_service):
    'Constructor for ChartService.\n\n    Args:\n      config_service (ConfigService): An instance of ConfigService.\n    '
    self.config_service = config_service
    self.issuesnapshot_tbl = sql.SQLTableManager(ISSUESNAPSHOT_TABLE_NAME)
    self.issuesnapshot2cc_tbl = sql.SQLTableManager(ISSUESNAPSHOT2CC_TABLE_NAME)
    self.issuesnapshot2component_tbl = sql.SQLTableManager(ISSUESNAPSHOT2COMPONENT_TABLE_NAME)
    self.issuesnapshot2label_tbl = sql.SQLTableManager(ISSUESNAPSHOT2LABEL_TABLE_NAME)