class_docstr: Print a v_array<T>
code: def to_string(self):
      return "size={}, capacity={}, erase count={}".format(
          self.size, self.capacity, self.erase_count
      )
  
file_path: vowpal_wabbit/vowpalwabbit/core/gdb_pretty_printers.py
imports: import itertools
  import gdb
label_desc: Use image node_id 3 for calling the VArrayPrinter obj's underlying member method code with example usage: obj.to_string() and returns: str