code: function getBreakContext(state, label) {
      let context = state.breakContext;
  
      while (context) {
          if (label ? context.label === label : context.breakable) {
              return context;
          }
          context = context.upper;
      }
  
      /* istanbul ignore next: foolproof (syntax error) */
      return null;
  }
docs: Gets a context for a `break` statement.
  
  @param {CodePathState} state - A state to get.
  @param {string} label - The label of a `break` statement.
  @returns {LoopContext|SwitchContext} A context for a `break` statement.