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blocks(callable_constraint) public

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# File actionpack/lib/action_dispatch/routing/mapper.rb, line 365
          def blocks(callable_constraint)
            unless callable_constraint.respond_to?(:call) || callable_constraint.respond_to?(:matches?)
              raise ArgumentError, "Invalid constraint: #{callable_constraint.inspect} must respond to :call or :matches?"
            end
            [callable_constraint]
          end
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