class_docstr: Rowtime descriptor for describing an event time attribute in the schema.
class_docstr_tok: ["Rowtime","descriptor","for","describing","an","event","time","attribute","in","the","schema","."]
docstr: Sets a built-in watermark strategy which indicates the watermarks should be preserved from
  the underlying DataStream API and thus preserves the assigned watermarks from the source.
  
  :return: This rowtime descriptor.
docstr_tok: ["Sets","a","built-in","watermark","strategy","which","indicates","the","watermarks","should","be","preserved","from","the","underlying","DataStream","API","and","thus","preserves","the","assigned","watermarks","from","the","source",".",":","return",":","This","rowtime","descriptor","."]
code: def watermarks_from_source(self) -> "Rowtime":
      """
      Sets a built-in watermark strategy which indicates the watermarks should be preserved from
      the underlying DataStream API and thus preserves the assigned watermarks from the source.
  
      :return: This rowtime descriptor.
      """
      self._j_rowtime = self._j_rowtime.watermarksFromSource()
      return self
  
imports: import sys
  from abc import ABCMeta
  from collections import OrderedDict
  from py4j.java_gateway import get_method
  from typing import Dict, Union
  from pyflink.java_gateway import get_gateway
  from pyflink.table.table_schema import TableSchema
  from pyflink.table.types import DataType, _to_java_data_type
label_desc: Use image node_id 7 for calling the Rowtime obj's underlying member method code with example usage: obj.watermarks_from_source() and returns: self