whole_func_string: function removeVariableDeclaration(t, bindVar, removeOpts) {
      let refPaths = bindVar.referencePaths || [];
      let removed;
  
      // try to remove the bind variable in multiple variable declarations
      refPaths.forEach(item => {
          let parentPath = item.getStatementParent();
          if (t.isVariableDeclaration(parentPath) && t.isIdentifier(item)) {
              removeNode(t, item.parentPath, removeOpts);
              removeComments(t, parentPath, 'leadingComments');
              removed = true;
          }
      });
  
      // if not multiple variable declarations,
      // remove the single variable declaration statement
      if (!removed) {
          removeNode(t, bindVar.path.getStatementParent(), removeOpts);
      }
  }
func_code_string: function removeVariableDeclaration(t, bindVar, removeOpts) {
      let refPaths = bindVar.referencePaths || [];
      let removed;
  
      // try to remove the bind variable in multiple variable declarations
      refPaths.forEach(item => {
          let parentPath = item.getStatementParent();
          if (t.isVariableDeclaration(parentPath) && t.isIdentifier(item)) {
              removeNode(t, item.parentPath, removeOpts);
              removeComments(t, parentPath, 'leadingComments');
              removed = true;
          }
      });
  
      // if not multiple variable declarations,
      // remove the single variable declaration statement
      if (!removed) {
          removeNode(t, bindVar.path.getStatementParent(), removeOpts);
      }
  }
func_documentation_string: Remove the bind variable declaration
  
  @inner
  @param {Object} t the babel type definition
  @param {Object} bindVar the bind variable path information
  @param {Object} removeOpts the remove options