Dumplie\Metadata\Schema\FieldDefinition::isNullable PHP Method

    public function isNullable() : bool;

 /**
  * @param string          $schema
  * @param Table           $table
  * @param string          $name
  * @param FieldDefinition $definition
  */
 public function map(string $schema, Table $table, string $name, FieldDefinition $definition)
 {
     $table->addColumn($name, 'float', ['notnull' => !$definition->isNullable(), 'default' => $definition->defaultValue(), 'unique' => $definition->options()['unique'] ?? false]);
     if ($definition->options()['index'] ?? false) {
         $table->addIndex([$name]);
     }
 }