docs: public static Number getPushNumber(InstructionHandle h) {
          Instruction prevIns = h.getInstruction();
          if (prevIns instanceof BIPUSH) {
              BIPUSH ldcCipher = (BIPUSH) prevIns;
              return ldcCipher.getValue();
          } else if (prevIns instanceof SIPUSH) {
              SIPUSH ldcCipher = (SIPUSH) prevIns;
              return ldcCipher.getValue();
          }
          return null;
      }