detect(node) {
    if (node.type !== 'VariableDeclaration') {
      return;
    }

    const declaration = find(dec => this.isRequireUtilInherits(dec), node.declarations);
    if (declaration) {
      return {
        type: 'Identifier',
        name: declaration.id.name,
      };
    }
  }
Detects: var <identifier> = require("util").inherits

@param {Object} node
@return {Object} Identifier