$definitions public property
Custom mask definitions to use. Should be configured as maskSymbol => settings, where
maskSymbol is a string, containing a character to identify your mask definition and
settings is an array, consisting of the following entries:
validator: string, a JS regular expression or a JS function.
cardinality: int, specifies how many characters are represented and validated for the definition.
prevalidator: array, validate the characters before the definition card