public Builder setArrayElementDelimiter(String delimiter) {
			Preconditions.checkNotNull(delimiter, "Delimiter must not be null.");
			this.csvSchema = this.csvSchema.rebuild().setArrayElementSeparator(delimiter).build();
			return this;
		}
Creates a {@link CsvRowSerializationSchema} expecting the given {@link TypeInformation}.

@param typeInfo type information used to create schema.
kafka-base/kafka-base-sink/src/main/java/com/dtstack/flink/sql/sink/kafka/serialization/CsvTupleSerializationSchema.java