Method: whileMethod(I)I
  0:	 // label
  1:	 // line number information
  2:	ICONST_0 
  3:	ISTORE 2
  4:	 // label
  5:	 // line number information
  6:	 // stack frame map
  7:	ILOAD 1
  8:	IFLE 19
  9:	 // label
  10:	 // line number information
  11:	ILOAD 2
  12:	ILOAD 1
  13:	IADD 
  14:	ISTORE 2
  15:	 // label
  16:	 // line number information
  17:	IINC 1 -1
  18:	GOTO 4
  19:	 // label
  20:	 // line number information
  21:	 // stack frame map
  22:	ILOAD 2
  23:	IRETURN