public Long getLong(final String key) {
    final String value = getString(key);
    return value == null ? null : Long.parseLong(value);
  }
Used in {@link PipeExtractor#customize(PipeParameters, PipeExtractorRuntimeConfiguration)} ,
{@link PipeProcessor#customize(PipeParameters, PipeProcessorRuntimeConfiguration)} and {@link
PipeConnector#customize(PipeParameters, PipeConnectorRuntimeConfiguration)}.

<p>This class is used to parse the parameters in WITH SOURCE, WITH PROCESSOR and WITH SINK when
creating a pipe.

<p>The input parameters are the key-value pair attributes for customization.
iotdb-api/pipe-api/src/main/java/org/apache/iotdb/pipe/api/customizer/parameter/PipeParameters.java