code: function extractInfoFromAst( ast ) {
      const output = {
          requires: [],
          exports: findExports( ast )
      };
      recursivelyExtractInfoFromAst( ast.program.body, output );
      return output;
  }
docs: Try to figure oout which modules are needed from this javascript code.
  @param {object} ast - Abstract Syntax Tree from Babel.
  @returns {object} `{ requires: [] }`.