flow like the river

BACK_BACK/node_modules/graphql/language/source.d.ts

@@ -0,0 +1,25 @@
+interface Location {
+  line: number;
+  column: number;
+}
+
+/**
+ * A representation of source input to GraphQL. The `name` and `locationOffset` parameters are
+ * optional, but they are useful for clients who store GraphQL documents in source files.
+ * For example, if the GraphQL input starts at line 40 in a file named `Foo.graphql`, it might
+ * be useful for `name` to be `"Foo.graphql"` and location to be `{ line: 40, column: 1 }`.
+ * The `line` and `column` properties in `locationOffset` are 1-indexed.
+ */
+export class Source {
+  body: string;
+  name: string;
+  locationOffset: Location;
+  constructor(body: string, name?: string, locationOffset?: Location);
+}
+
+/**
+ * Test if the given value is a Source object.
+ *
+ * @internal
+ */
+export function isSource(source: any): source is Source;