src/Options/FieldsetCustomizationOptions.php
public function isEnabled($field)
    {
        return !isset($this->fields[$field]['enabled']) || (bool) $this->fields[$field]['enabled'];
    }
public function isEnabled($field)
    {
        return !isset($this->fields[$field]['enabled']) || (bool) $this->fields[$field]['enabled'];
    }
Is a field enabled?

Returns true, if
- There is no customized $field.
- The $field spec does not have the key 'enabled'
- The key 'enabled' is NOT TRUE.

@param string $field

@return bool