code: def apply_role(name, read = nil, write = nil)
        name = name.name if name.is_a?(Parse::Role)
        apply("role:#{name}", read, write)
      end
docs: Apply a {Parse::Role} to this ACL.
   @overload apply_role(role, read = nil, write = nil)
    @param role [Parse::Role] the role object.
    @param read [Boolean] the read permission.
    @param write [Boolean] the write permission.
   @overload apply_role(role_name, read = nil, write = nil)
    @param role_name [String] the name of the role.
    @param read [Boolean] the read permission.
    @param write [Boolean] the write permission.