t; attr(,&quot;class&quot;)
#&gt; [1] &quot;booltype&quot; &quot;which&quot;   
#&gt; 
#&gt; $`70000001:80000000`
#&gt; integer(0)
#&gt; attr(,&quot;maxindex&quot;)
#&gt; [1] 100000000
#&gt; attr(,&quot;class&quot;)
#&gt; [1] &quot;booltype&quot; &quot;which&quot;   
#&gt; 
#&gt; $`80000001:90000000`
#&gt; integer(0)
#&gt; attr(,&quot;maxindex&quot;)
#&gt; [1] 100000000
#&gt; attr(,&quot;class&quot;)
#&gt; [1] &quot;booltype&quot; &quot;which&quot;   
#&gt; 
#&gt; $`90000001:100000000`
#&gt; integer(0)
#&gt