function check(content, deps, path) {
  if (
    // Pattern: import plugins from 'gulp-load-plugins', $ = plugins(), $.jshint()
    importDetector(path.node)[0] === 'gulp-load-plugins' &&
    path.isImportDeclaration() &&
    path.get('specifiers')[0] &&
    path.get('specifiers')[0].isImportDefaultSpecifier() &&
    path.get('specifiers')[0].get('local').isIdentifier()
  ) {
    const importVariableName = path.get('specifiers')[0].get('local').node.name;
    const identifierReferences = getIdentifierReferences(
      path,
      importVariableName,
    );
    const packageNames = identifierReferences.map((r) =>
      getPackageName(content, deps, r),
    );
    return packageNames;
  }
  if (
    // Pattern: plugins = require('gulp-load-plugins'), $ = plugins(), $.jshint()
    requireDetector(path.node)[0] === 'gulp-load-plugins' &&
    path.isCallExpression() &&
    path.parentPath.isVariableDeclarator() &&
    path.parentPath.get('id').isIdentifier()
  ) {
    const requireVariableName = path.parentPath.get('id').node.name;
    const identifierReferences = getIdentifierReferences(
      path,
      requireVariableName,
    );
    const packageNames = identifierReferences.map((r) =>
      getPackageName(content, deps, r),
    );
    return packageNames;
  }
  if (
    // Pattern: $ = require('gulp-load-plugins')(), $.jshint()
    requireDetector(path.node)[0] === 'gulp-load-plugins' &&
    path.isCallExpression() &&
    path.parentPath.isCallExpression() &&
    path.parentPath.parentPath.isVariableDeclarator() &&
    path.parentPath.parentPath.get('id').isIdentifier()
  ) {
    const requireVariableName = path.parentPath.parentPath.get('id').node.name;
    const identifierReferences = getReferences(path, requireVariableName);
    const packageNames = identifierReferences.map((r) =>
      getPackageName(content, deps, r),
    );
    return packageNames;
  }
  if (
    // Pattern: require('gulp-load-plugins')().thisPlugin()
    requireDetector(path.node)[0] === 'gulp-load-plugins' &&
    path.isCallExpression() &&
    path.parentPath.isCallExpression() &&
    path.parentPath.parentPath.isMemberExpression()
  ) {
    const packageName = getPackageName(content, deps, path.parentPath);
    return [packageName];
  }

  return [];
}
Get the gulp packages found from the path. This is the entry for traverse.