new_contents: from ...orm import SetupTrump, SymbolManager
  from ..metamatrix import MetaMatrix
  
  import pandas as pd
  from pandas.util.testing import assert_frame_equal
  
  class TestToolsSQLA(object):
      
      def setup_method(self, test_method):
          self.eng = SetupTrump()
          self.sm = SymbolManager(self.eng)
  
      def test_metamatrix(self):
          tikrs = [x * 3 for x in list('jkl')]
          syms = []
          for s in tikrs:
              sym = self.sm.create(s, overwrite=True)
              sym.add_meta(alpha='a', beta='b', charlie='c')
              syms.append(sym)
          
          mm = MetaMatrix(syms)
          
          mmr = mm(['alpha','beta'])
          
          exp = pd.DataFrame({'alpha' : ['a'] * 3,
                              'beta' : ['b'] * 3}, index = tikrs)
          
          exp.index.name = 'trumpsym'        
          assert_frame_equal(mmr, exp)
subject: Add test for metamatrix