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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def merge_pexes(cls, path, pex_info, interpreter, pexes, interpeter_constraints=None):
 """Generates a merged pex at path."""

    with cls.merged_pex(path, pex_info, interpreter, pexes, interpeter_constraints) as builder:
      builder.freeze()