modules/spring-mock-mvc/src/main/java/io/restassured/module/mockmvc/internal/MockMvcRequestSpecificationImpl.java
public MockMvcRequestSpecification sessionAttrs(Map<String, Object> sessionAttributes) {
        notNull(sessionAttributes, "sessionAttributes");
        parameterUpdater.updateParameters(convert(cfg.getMockMvcParamConfig().sessionAttributesUpdateStrategy()), sessionAttributes, this.sessionAttributes);
        return this;
    }
public MockMvcRequestSpecification sessionAttrs(Map<String, Object> sessionAttributes) {
        notNull(sessionAttributes, "sessionAttributes");
        parameterUpdater.updateParameters(convert(cfg.getMockMvcParamConfig().sessionAttributesUpdateStrategy()), sessionAttributes, this.sessionAttributes);
        return this;
    }
public MockMvcRequestSpecification sessionAttrs ( Map < String , Object > sessionAttributes ) { notNull ( sessionAttributes , "sessionAttributes" ) ; parameterUpdater . updateParameters ( convert ( cfg . getMockMvcParamConfig ( ) . sessionAttributesUpdateStrategy ( ) ) , sessionAttributes , this . sessionAttributes ) ; return this ; }
Set session attributes.

@param sessionAttributes the session attributes
Set session attributes .