How to use the grim.getDeprecations function in grim

return Grim.on('updated', function() {
    const deprecations = Grim.getDeprecations().map(deprecation =>
      deprecation.serialize()
    );
    Grim.clearDeprecations();
    return global.emit('task:deprecations', deprecations);
  });
};

setImmediate(() => {
        for (let deprecation of grim.getDeprecations()) {
          this.reportDeprecation(deprecation)
        }
      })
    })

getDeprecatedCallsByPackageName() {
    const deprecatedCalls = Grim.getDeprecations();
    deprecatedCalls.sort((a, b) => b.getCallCount() - a.getCallCount());
    const deprecatedCallsByPackageName = {};
    for (const deprecation of deprecatedCalls) {
      const stacks = deprecation.getStacks();
      stacks.sort((a, b) => b.callCount - a.callCount);
      for (const stack of stacks) {
        let packageName = null;
        if (stack.metadata && stack.metadata.packageName) {
          packageName = stack.metadata.packageName;
        } else {
          packageName = (this.getPackageName(stack) || '').toLowerCase();
        }

        deprecatedCallsByPackageName[packageName] =
          deprecatedCallsByPackageName[packageName] || [];
        deprecatedCallsByPackageName[packageName].push({ deprecation, stack });