check_validity!() public

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# File activemodel/lib/active_model/validations/numericality.rb, line 16
      def check_validity!
        keys = CHECKS.keys - [:odd, :even]
        options.slice(*keys).each do |option, value|
          unless value.is_a?(Numeric) || value.is_a?(Proc) || value.is_a?(Symbol)
            raise ArgumentError, ":#{option} must be a number, a symbol or a proc"
          end
        end
      end
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