public void putToMStringString(java.lang.String key, java.lang.String val) {
    if (this.mStringString == null) {
      this.mStringString = new java.util.HashMap<java.lang.String,java.lang.String>();
    }
    this.mStringString.put(key, val);
  }
Returns true if field lintString is set (has been assigned a value) and false otherwise
serde/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/serde2/thrift/test/Complex.java