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node_modules/graphql/utilities/coerceValue.d.ts

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+import { Path } from '../jsutils/Path';
+import { GraphQLError } from '../error/GraphQLError';
+import { ASTNode } from '../language/ast';
+import { GraphQLInputType } from '../type/definition';
+
+interface CoercedValue {
+  readonly errors: ReadonlyArray<GraphQLError> | undefined;
+  readonly value: any;
+}
+
+/**
+ * Coerces a JavaScript value given a GraphQL Type.
+ *
+ * Returns either a value which is valid for the provided type or a list of
+ * encountered coercion errors.
+ *
+ */
+export function coerceValue(
+  inputValue: any,
+  type: GraphQLInputType,
+  blameNode?: ASTNode,
+  path?: Path,
+): CoercedValue;