double _gtk_css_position_value_get_x (const GtkCssValue *position,
double one_hundred_percent);
double _gtk_css_position_value_get_y (const GtkCssValue *position,
double one_hundred_percent);
double _gtk_css_position_value_get_x (const GtkCssValue *position,
double one_hundred_percent);
double _gtk_css_position_value_get_y (const GtkCssValue *position,
double one_hundred_percent);