Array of constraint options keyed by constraint plugin ID. Type:

public FieldConfigBase::getItemDefinition()

public FieldConfigBase::addPropertyConstraints($name, array $constraints)

Field-type specific settings. An array of key/value pairs. The keys and default values are defined by the field type.

The field description. A human-readable description for the field when used with this bundle. For example, the description will be the help

public static FieldConfigBase::createFromDataType($type)

Flag indicating whether the field is required. TRUE if a value for this field is required when used with this bundle, FALSE otherwise. Currently

The field ID. The ID consists of 3 parts: the entity type, bundle and the field name. Example: node.article

public FieldConfigBase::getSettings() Returns

public FieldConfigBase::getTargetBundle()