public ColumnInfo setDoc(@org.apache.amoro.shade.thrift.org.apache.thrift.annotation.Nullable java.lang.String doc) {
    this.doc = doc;
    return this;
  }
Returns true if field type is set (has been assigned a value) and false otherwise
amoro-common/src/main/gen-java/org/apache/amoro/api/ColumnInfo.java