question: decrements the given number down to the closest power of two . if the argument is a power of two , it remains unchanged . concode_field_sep PlaceHolder placeHolder concode_field_sep boolean isPowerOf2 concode_elem_sep int log2strict concode_elem_sep int log2floor concode_elem_sep int checkedDownCast
target: int function ( int arg0 ) { return Integer . highestOneBit ( arg0 ) ; }