fix: presubmit errors

src/codec.ts

@@ -21,6 +21,7 @@
 import {common as p} from 'protobufjs';
 import {google as spannerClient} from '../protos/protos';
 import {GoogleError} from 'google-gax';
+import { Spanner } from '.';
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export type Value = any;

src/index.ts

@@ -1681,7 +1681,7 @@ class Spanner extends GrpcService {
    * @example
    * ```
    * const {Spanner} = require('@google-cloud/spanner');
-   * const float = Spanner.float(10);
+   * const float = Spanner.float32(10);
    * ```
    */
   static float32(value): Float32 {

test/index.ts

@@ -500,15 +500,15 @@ describe('Spanner', () => {
       const value = {};
       const customValue = {};
 
-      fakeCodec.Float = class {
+      fakeCodec.Float32 = class {
         constructor(value_) {
           assert.strictEqual(value_, value);
           return customValue;
         }
       };
 
-      const float = Spanner.float32(value);
-      assert.strictEqual(float, customValue);
+      const float32 = Spanner.float32(value);
+      assert.strictEqual(float32, customValue);
     });
   });