Type functions

These functions create and manipulate type values.

Name	Description
Type.AddTableKey	Add a key to a table type.
Type.ClosedRecord	The given type must be a record type returns a closed version of the given record type (or the same type, if it is already closed)
Type.Facets	Returns the facets of a type.
Type.ForFunction	Creates a function type from the given .
Type.ForRecord	Returns a Record type from a fields record.
Type.FunctionParameters	Returns a record with field values set to the name of the parameters of a function type, and their values set to their corresponding types.
Type.FunctionRequiredParameters	Returns a number indicating the minimum number of parameters required to invoke the a type of function.
Type.FunctionReturn	Returns a type returned by a function type.
Type.Is	Determines if a value of the first type is always compatible with the second type.
Type.IsNullable	Returns true if a type is a nullable type; otherwise, false.
Type.IsOpenRecord	Returns whether a record type is open.
Type.ListItem	Returns an item type from a list type.
Type.NonNullable	Returns the non nullable type from a type.
Type.OpenRecord	Returns an opened version of a record type, or the same type, if it is already open.
Type.RecordFields	Returns a record describing the fields of a record type with each field of the returned record type having a corresponding name and a value that is a record of the form [ Type = type, Optional = logical ].
Type.ReplaceFacets	Replaces the facets of a type.
Type.ReplaceTableKeys	Replaces the keys in a table type.
Type.TableColumn	Returns the type of a column in a table.
Type.TableKeys	Returns keys from a table type.
Type.TableRow	Returns a row type from a table type.
Type.TableSchema	Returns a table containing a description of the columns (i.e. the schema) of the specified table type.
Type.Union	Returns the union of a list of types.