# Functions
Bool validate false, true, 1, 0, "true", "false", "0", "1".
Email is the validation function for validating if the current field's value is a valid email address.
Len validate length for next types: String, Slice, Map, Array, Int, Int8, Int16, Int32, Int64, Uint, Uint8, Uint16, Uint32, Uint64, Uintptr, Float32, Float64.
# Variables
BuiltInHandlers is the default pack of validations.