code: public void push(final String value) {
          if (value == null) {
              mv.visitInsn(Opcodes.ACONST_NULL);
          } else {
              mv.visitLdcInsn(value);
          }
      }
docs: Generates the instruction to push the given value on the stack.
  
  @param value
  the value to be pushed on the stack. May be <tt>null</tt>.