duplicate method Accept

other declaration of Accept

cannot use s (variable of type *Backtracking_controlContext) as antlr.RuleContext value in return statement: *Backtracking_controlContext does not implement antlr.RuleContext (wrong type for method Accept)

cannot use localctx (variable of type IBacktracking_controlContext) as antlr.ParserRuleContext value in argument to p.EnterRule: IBacktracking_controlContext does not implement antlr.ParserRuleContext (wrong type for method Accept)

cannot use localctx (variable of type IBacktracking_controlContext) as antlr.ParserRuleContext value in argument to p.EnterOuterAlt: IBacktracking_controlContext does not implement antlr.ParserRuleContext (wrong type for method Accept)

Process completed with exit code 1.