@Override
  public java.lang.String toString() {
    java.lang.StringBuilder sb = new java.lang.StringBuilder("PrimaryKeySpec(");
    boolean first = true;

    sb.append("fields:");
    if (this.fields == null) {
      sb.append("null");
    } else {
      sb.append(this.fields);
    }
    first = false;
    sb.append(")");
    return sb.toString();
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
amoro-common/src/main/gen-java/org/apache/amoro/api/PrimaryKeySpec.java