Error in making schemas

[wizd]

C:\tmp\gogo\node_modules\graphql-s2s\src\utilities.js:38
const escapeGraphQlSchema = (sch, cr='░', t=' ') => sch.replace(/[\n\r]+/g, cr).replace(/[\t\r]+/g, t).replace(/\s+/g, ' ')
^
TypeError: sch.replace is not a function
at escapeGraphQlSchema (C:\tmp\gogo\node_modules\graphql-s2s\src\utilities.js:38:57)
at extractGraphMetadata (C:\tmp\gogo\node_modules\graphql-s2s\src\graphmetadata.js:109:60)
at removeGraphMetadata (C:\tmp\gogo\node_modules\graphql-s2s\src\graphmetadata.js:164:15)
at getSchemaAST (C:\tmp\gogo\node_modules\graphql-s2s\src\graphqls2s.js:1147:34)
at transpile (C:\tmp\gogo\node_modules\graphql-s2s\src\graphqls2s.js:1154:15)
at Object. (C:\tmp\gogo\src\graphql.ts:15:14)
at Module._compile (internal/modules/cjs/loader.js:1063:30)
at Module.m._compile (C:\tmp\gogo\node_modules\ts-node\src\index.ts:1056:23)
at Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
at Object.require.extensions. [as .ts] (C:\tmp\gogo\node_modules\ts-node\src\index.ts:1059:12)
at Module.load (internal/modules/cjs/loader.js:928:32)
at Function.Module._load (internal/modules/cjs/loader.js:769:14)
at Module.require (internal/modules/cjs/loader.js:952:19)
at require (internal/modules/cjs/helpers.js:88:18)
at Object. (C:\tmp\gogo\src\index.ts:10:1)
at Module._compile (internal/modules/cjs/loader.js:1063:30)
Waiting for the debugger to disconnect...
[nodemon] app crashed - waiting for file changes before starting...

my schemas:

export const DefaultSchema = `
  type Query {
    _empty: String
  }

  type Mutation {
    _empty: String
  }
`;

export const BlockTypes = `
  enum BlockTypes {
    Null
    Service
    Consolidation
    Sync
}
`;
export const BlockSchema = `
  scalar Date
  scalar JSON

  type Block {
    id: ID!
    Hash: String!
    Height: Int!
    TimeStamp: Date!
    Version: Int!
    BlockType: BlockTypes!
    PreviousHash: String
    ServiceHash: String
    Tags: JSON
  }
`;
export const schema = [DefaultSchema, BlockTypes, BlockSchema];

[wizd]

ok, found that I should not use array.

export const schema = DefaultSchema + BlockTypes + BlockSchema;