sminnee / silverstripe-framework

                }

                // Format validation

                if (!is_array($method) || !isset($method[0]) || isset($method[2])) {

                    throw new \InvalidArgumentException(

                        "'calls' entries in service definition should be 1 or 2 element arrays."

                    );

                }

                if (!is_string($method[0])) {

                    throw new \InvalidArgumentException("1st element of a 'calls' entry should be a string");

                }

                if (!is_string($method[0])) {

                    throw new \InvalidArgumentException("1st element of a 'calls' entry should be a string");

                }

                if (isset($method[1]) && !is_array($method[1])) {

                    throw new \InvalidArgumentException("2nd element of a 'calls' entry should an arguments array");

                }

                // Check that the method exists and is callable

                $objectMethod = array($object, $method[0]);