Ordinarily, a form is only validated once, but there are times when a form is resubmitted internally and should be validated again. Setting this to TRUE will force that to

public FormState::addCleanValueKey($cleanValueKey) Adds

public FormState::getResponse() Gets a response

The HTTP method used by the request building or processing this form. May be any valid HTTP method. Defaults to 'GET', because even though $method

public FormState::getSubmitHandlers() Gets

Contains errors for this form. This property is uncacheable. Type:

public FormState::addRebuildInfo($property, $value) Adds

public FormState::isCached() Determines

If TRUE, the form was submitted programmatically, usually invoked via

public FormState::setLimitValidationErrors($limit_validation_errors)