成员的完整列表，这些成员属于 com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder,包括所有继承而来的类成员

build()	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder
builder()	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder	static
withExt(String ext)	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder
withMd5(String md5)	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder
withName(String name)	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder
withPath(String path)	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder
withSceneName(String sceneName)	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder
withSize(long size)	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder
withUrl(String url)	com.netease.nimlib.sdk.v2.message.attachment.builder.V2NIMMessageFileAttachmentBuilder