def constructor_is_method_name(constructor: str) -> bool:
    """Decides wheter given constructor is a method name.
    
    Cipher is not a method name
    Cipher.getInstance is a method name
    getS is a method name
    """
    
    found_index = constructor.find(".")
    method_start_i = found_index + 1
    return len(constructor) > method_start_i and constructor[method_start_i].islower()