rest-assured/src/main/java/io/restassured/builder/ResponseSpecBuilder.java
public ResponseSpecBuilder expectHeader(String headerName, String expectedValue) {
        spec.header(headerName, expectedValue);
        return this;
    }
public ResponseSpecBuilder expectHeader(String headerName, String expectedValue) {
        spec.header(headerName, expectedValue);
        return this;
    }
public ResponseSpecBuilder expectHeader ( String headerName , String expectedValue ) { spec . header ( headerName , expectedValue ) ; return this ; }
Expect that a response header matches the supplied name and value.

@param headerName    The name of the expected header
@param expectedValue The value of the expected header
@return The builder
Expect that a response header matches the supplied name and value .