How to use the phoenixdb.types.TypeHelper.from_class function in phoenixdb

def _set_signature(self, signature):
        self._signature = signature
        self._column_data_types = []
        self._parameter_data_types = []
        if signature is None:
            return

        for column in signature.columns:
            dtype = TypeHelper.from_class(column.column_class_name)
            self._column_data_types.append(dtype)

        for parameter in signature.parameters:
            dtype = TypeHelper.from_class(parameter.class_name)
            self._parameter_data_types.append(dtype)

def _set_signature(self, signature):
        self._signature = signature
        self._column_data_types = []
        self._parameter_data_types = []
        if signature is None:
            return

        for column in signature.columns:
            dtype = TypeHelper.from_class(column.column_class_name)
            self._column_data_types.append(dtype)

        for parameter in signature.parameters:
            dtype = TypeHelper.from_class(parameter.class_name)
            self._parameter_data_types.append(dtype)

def _set_signature(self, signature):
        self._signature = signature
        self._column_data_types = []
        self._parameter_data_types = []
        if signature is None:
            return

        for column in signature.columns:
            dtype = TypeHelper.from_class(column.column_class_name)
            self._column_data_types.append(dtype)

        for parameter in signature.parameters:
            dtype = TypeHelper.from_class(parameter.class_name)
            self._parameter_data_types.append(dtype)

def _set_signature(self, signature):
        self._signature = signature
        self._column_data_types = []
        self._parameter_data_types = []
        if signature is None:
            return

        for column in signature.columns:
            dtype = TypeHelper.from_class(column.column_class_name)
            self._column_data_types.append(dtype)

        for parameter in signature.parameters:
            dtype = TypeHelper.from_class(parameter.class_name)
            self._parameter_data_types.append(dtype)