Annotate class names of optimizers for closure compiler (tensorflow#1415)

Annotate class names of optimizers so closure compiler doesn't rename

Author: dsmilkov

src/optimizers/adadelta_optimizer.ts

@@ -25,6 +25,7 @@ import {Optimizer} from './optimizer';
 
 /** @doclink Optimizer */
 export class AdadeltaOptimizer extends Optimizer {
+  /** @nocollapse */
   static className = 'AdadeltaOptimizer';
   private c: Scalar;
   private epsilonScalar: Scalar;

src/optimizers/adagrad_optimizer.ts

@@ -25,6 +25,7 @@ import {Optimizer} from './optimizer';
 
 /** @doclink Optimizer */
 export class AdagradOptimizer extends Optimizer {
+  /** @nocollapse */
   static className = 'AdagradOptimizer';
   private c: Scalar;
   private epsilon: Scalar;

src/optimizers/adam_optimizer.ts

@@ -24,6 +24,7 @@ import {NamedVariableMap} from '../tensor_types';
 import {Optimizer} from './optimizer';
 
 export class AdamOptimizer extends Optimizer {
+  /** @nocollapse */
   static className = 'AdamOptimizer';
   private c: Scalar;
   private epsScalar: Scalar;

src/optimizers/adamax_optimizer.ts

@@ -24,6 +24,7 @@ import {NamedVariableMap} from '../tensor_types';
 import {Optimizer} from './optimizer';
 
 export class AdamaxOptimizer extends Optimizer {
+  /** @nocollapse */
   static className = 'AdamaxOptimizer';
   private c: Scalar;
   private epsScalar: Scalar;

src/optimizers/momentum_optimizer.ts

@@ -25,6 +25,7 @@ import {SGDOptimizer} from './sgd_optimizer';
 
 /** @doclink Optimizer */
 export class MomentumOptimizer extends SGDOptimizer {
+  /** @nocollapse */
   static className = 'MomentumOptimizer';
   private m: Scalar;
   private accumulations: NamedVariableMap;

src/optimizers/rmsprop_optimizer.ts

@@ -25,6 +25,7 @@ import {Optimizer} from './optimizer';
 
 /** @doclink Optimizer */
 export class RMSPropOptimizer extends Optimizer {
+  /** @nocollapse */
   static className = 'RMSPropOptimizer';
   private c: Scalar;
   private epsilonScalar: Scalar;

src/optimizers/sgd_optimizer.ts

@@ -25,6 +25,7 @@ import {Optimizer} from './optimizer';
 
 /** @doclink Optimizer */
 export class SGDOptimizer extends Optimizer {
+  /** @nocollapse */
   static className = 'SGDOptimizer';
   protected c: Scalar;