src/Type/Definition/FieldDefinition.php
public function getArg($name)
    {
        foreach ($this->args ?: [] as $arg) {
            /** @var FieldArgument $arg */
            if ($arg->name === $name) {
                return $arg;
            }
        }

        return null;
    }
public function getArg($name)
    {
        foreach ($this->args ?: [] as $arg) {
            /** @var FieldArgument $arg */
            if ($arg->name === $name) {
                return $arg;
            }
        }

        return null;
    }
public function getArg ( $ name ) { foreach ( $ this -> args ? : [ ] as $ arg ) { /** @var FieldArgument $arg */ if ( $ arg -> name === $ name ) { return $ arg ; } } return null ; }
@param string $name

@return FieldArgument|null
@param string $name