Return a structure from a name
        Args:
            structure_name (str): name of the structure
        Returns:
            Structure

def get_structure_from_name(self, structure_name):
        """
            Return a structure from a name
        Args:
            structure_name (str): name of the structure
        Returns:
            Structure
        """
        return next((st for st in self.structures if st.name == structure_name), None)