class_docstr: Check if all values in a column pass a test.
  
  :param column_name:
      The name of the column to check.
  :param test:
      Either a single value that all values in the column are compared against
      (for equality) or a function that takes a column value and returns
      `True` or `False`.
docstr: :returns:
      :class:`bool`
docstr_tok: [":","returns",":",":","class",":","`","bool","`"]
code: def run(self, table):
      """
      :returns:
          :class:`bool`
      """
      column = table.columns[self._column_name]
      data = column.values()
  
      return all(self._test(d) for d in data)
  
file_path: agate/agate/aggregations/all.py
imports: from agate.aggregations.base import Aggregation
  from agate.data_types import Boolean
label_desc: Use image node_id 4 for calling the All obj's underlying member method code with example usage: obj.run(table) and returns: all