Schema Coordinate ast nodes

export type SchemaCoordinate = {|
  +kind: 'SchemaCoordinate',
  +coordinate: CoordinateNode,
|};

export type CoordinateNode =
  | EnumNode
  | ObjectNode
  | InputObjectNode
  | InterfaceNode;

export type EnumNode = {|
  +kind: 'EnumNode',
  +name: NameNode,
  +member?: EnumMemberNode,
|};

export type EnumMemberNode = {|
  +kind: 'EnumMemberNode',
  +name: NameNode,
|};

export type ObjectNode = {|
  +kind: 'ObjectNode',
  +type: TypeName,
|};

export type TypeNameNode = {|
  +kind: 'TypeNameNode',
  +name: NameNode,
  +field?: FieldNameNode,
|};

export type FieldNameNode = {|
  +kind: 'FieldNameNode',
  +name: NameNode,
  +argument?: ArgumentNameNode,
|};

export type ArgumentNameNode = {|
  +kind: 'ArgumentNameNode',
  +name: NameNode,
|};

export type NameNode = {|
  +kind: 'Name',
  +value: string,
|};

export type InputObjectNode = {|
  +kind: 'InputObjectNode',
  +type: TypeName,
|};

export type InterfaceNode = {|
  +kind: 'InterfaceNode',
  +type: TypeName,
|};

hmm maybe:

-  +type: TypeName,
+  +typeName: TypeName,

-  +argument?: ArgumentNameNode,
+  +argumentName?: ArgumentNameNode,