g_value_register_transform_func (G_TYPE_STRING, G_TYPE_DOUBLE, tx_string_to_double);
g_value_register_transform_func (G_TYPE_STRING, G_TYPE_INT, tx_string_to_int);
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+
g_value_register_transform_func (measure_enum_type, G_TYPE_STRING, enum_to_string);
g_value_register_transform_func (align_enum_type, G_TYPE_STRING, enum_to_string);
g_value_register_transform_func (role_enum_type, G_TYPE_STRING, enum_to_string);