class_docstr: A line in a line break chart.
class_docstr_tok: ["A","line","in","a","line","break","chart","."]
docstr: True if the line is black (falling prices).
docstr_tok: ["True","if","the","line","is","black","(","falling","prices",")","."]
code: def isBlack(self):
      """True if the line is black (falling prices)."""
      return not self.__white
  
file_path: pyalgotrade/pyalgotrade/technical/linebreak.py
imports: from pyalgotrade import dataseries
  from pyalgotrade.dataseries import bards
label_desc: Use image node_id 6 for calling the Line obj's underlying member method code with example usage: obj.isBlack() and returns: unknown