=> 0x7f9f15a300fb <instance_get_window+58>:	mov    (%rax),%rax
   0x7f9f15a300fe <instance_get_window+61>:	mov    %rax,-0x18(%rbp)
   0x7f9f15a30102 <instance_get_window+65>:	mov    -0x18(%rbp),%rax
   0x7f9f15a30106 <instance_get_window+69>:	mov    %rax,%rdi
   0x7f9f15a30109 <instance_get_window+72>:	callq  0x7f9f15a1e71f
   0x7f9f15a3010e <instance_get_window+77>:	mov    %rax,-0x10(%rbp)
   0x7f9f15a30112 <instance_get_window+81>:	mov    -0x10(%rbp),%rax
   0x7f9f15a30116 <instance_get_window+85>:	mov    %rax,-0x8(%rbp)
   0x7f9f15a3011a <instance_get_window+89>:	mov    -0x8(%rbp),%rax
   0x7f9f15a3011e <instance_get_window+93>:	leaveq 
   0x7f9f15a3011f <instance_get_window+94>:	retq   
   0x7f9f15a30120:	push   %rbp
   0x7f9f15a30121:	mov    %rsp,%rbp
   0x7f9f15a30124:	sub    $0x20,%rsp
   0x7f9f15a30128:	mov    %rdi,-0x18(%rbp)
   0x7f9f15a3012c:	mov    %rsi,-0x20(%rbp)