sp.disable_function.function("system").drop();
sp.disable_function.function("vprintf").hash("123456789").drop();
sp.disable_function.function("printf").disable().drop();
sp.disable_function.function("printf").simulation().drop();
sp.disable_function.function("print").disable().drop();  # this is a comment
sp.disable_function.function_r("^var_dump$").drop();
sp.disable_function.function("sprintf").filename("/wrong file name").drop();
sp.disable_function.function("sprintf").filename("/wrong file name").drop();
sp.disable_function.function("eval").drop();