code: def _get_element_in_pif_composition_(pif, elemental_symbol):
      
      if pif.composition is None:
          pif.composition = []
      for i, c in enumerate(pif.composition):
          if c.element == elemental_symbol or c.element.lower(
          ) == elements_data[elemental_symbol]["name"].lower():
              return [c, i]
          i += 1
      return False
docs: If the element in question if in the composition array in the pif, it returns that Composition object and the position in the composition array otherwise it returns False
  
      :param pif: ChemicalSystem Pif in question
      :param elemental_symbol: string of the atomic symbol of the element in question
      :return: either False if not found in the composition or the Compositional object along with its index in the composition array in the pif