public void setUnionMStringString(java.util.Map<java.lang.String,java.lang.String> value) {
    setField_ = _Fields.UNION_MSTRING_STRING;
    value_ = java.util.Objects.requireNonNull(value,"_Fields.UNION_MSTRING_STRING");
  }
Find the _Fields constant that matches name, or null if its not found.
serde/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/serde2/thrift/test/PropValueUnion.java