[node]Add node binding api to get number of loaded SavedModel

[kangyizhang]

Add a new API in the node binding to return the number of loaded TF SavedModel in the backend. This will help testing and users could get a better understanding of the backend.

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This change is 

[dsmilkov]

Reviewed 8 of 8 files at r1.
Reviewable status: complete! 1 of 1 approvals obtained (waiting on @dsmilkov and @kangyizhang)

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tfjs-node/binding/tfjs_backend.cc, line 1221 at r1 (raw file):

}

napi_value TFJSBackend::GetNumOfSavedModel(napi_env env) {

add "s" at the end: GetNumOfSavedModels

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tfjs-node/binding/tfjs_backend.cc, line 1223 at r1 (raw file):

napi_value TFJSBackend::GetNumOfSavedModel(napi_env env) {
  napi_status nstatus;
  napi_value number_of_savedmodel;

nit: rename to "num_saved_models" to be consistent with the snake casting

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tfjs-node/binding/tfjs_binding.cc, line 227 at r1 (raw file):

}

static napi_value GetNumOfSavedModel(napi_env env, napi_callback_info info) {

same here, add "s" at the end

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tfjs-node/src/nodejs_kernel_backend.ts, line 1967 at r1 (raw file):

  }

  getNumOfSavedModel() {

same here, add "s" at the end. Uou can also shorten it to "getNumModels"

[kangyizhang]

Reviewable status: complete! 1 of 1 approvals obtained

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tfjs-node/binding/tfjs_backend.cc, line 1221 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

add "s" at the end: GetNumOfSavedModels

Done.

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tfjs-node/binding/tfjs_backend.cc, line 1223 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

nit: rename to "num_saved_models" to be consistent with the snake casting

Done.

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tfjs-node/binding/tfjs_binding.cc, line 227 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

same here, add "s" at the end

Done.

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tfjs-node/src/nodejs_kernel_backend.ts, line 1967 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

same here, add "s" at the end. Uou can also shorten it to "getNumModels"

Done.