rb_big_lshift    2690 bignum.c           rb_define_method(rb_cBignum, "<<", rb_big_lshift, 1);
rb_big_lshift     119 include/ruby/intern.h VALUE rb_big_lshift(VALUE, VALUE);
rb_big_lshift    2726 numeric.c      	return rb_big_lshift(rb_int2big(val), y);
rb_big_lshift    2738 numeric.c      	return rb_big_lshift(rb_int2big(val), ULONG2NUM(width));